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-rw-r--r--drivers/crypto/ccp/Makefile3
-rw-r--r--drivers/crypto/ccp/ccp-crypto-sha.c5
-rw-r--r--drivers/crypto/ccp/ccp-debugfs.c344
-rw-r--r--drivers/crypto/ccp/ccp-dev-v5.c28
-rw-r--r--drivers/crypto/ccp/ccp-dev.c3
-rw-r--r--drivers/crypto/ccp/ccp-dev.h20
-rw-r--r--drivers/crypto/ccp/ccp-platform.c4
7 files changed, 400 insertions, 7 deletions
diff --git a/drivers/crypto/ccp/Makefile b/drivers/crypto/ccp/Makefile
index 60919a3ec53b..59493fd3a751 100644
--- a/drivers/crypto/ccp/Makefile
+++ b/drivers/crypto/ccp/Makefile
@@ -4,7 +4,8 @@ ccp-objs := ccp-dev.o \
ccp-dev-v3.o \
ccp-dev-v5.o \
ccp-platform.o \
- ccp-dmaengine.o
+ ccp-dmaengine.o \
+ ccp-debugfs.o
ccp-$(CONFIG_PCI) += ccp-pci.o
obj-$(CONFIG_CRYPTO_DEV_CCP_CRYPTO) += ccp-crypto.o
diff --git a/drivers/crypto/ccp/ccp-crypto-sha.c b/drivers/crypto/ccp/ccp-crypto-sha.c
index 6b46eea94932..ce97b3868f4a 100644
--- a/drivers/crypto/ccp/ccp-crypto-sha.c
+++ b/drivers/crypto/ccp/ccp-crypto-sha.c
@@ -18,6 +18,7 @@
#include <linux/crypto.h>
#include <crypto/algapi.h>
#include <crypto/hash.h>
+#include <crypto/hmac.h>
#include <crypto/internal/hash.h>
#include <crypto/sha.h>
#include <crypto/scatterwalk.h>
@@ -308,8 +309,8 @@ static int ccp_sha_setkey(struct crypto_ahash *tfm, const u8 *key,
}
for (i = 0; i < block_size; i++) {
- ctx->u.sha.ipad[i] = ctx->u.sha.key[i] ^ 0x36;
- ctx->u.sha.opad[i] = ctx->u.sha.key[i] ^ 0x5c;
+ ctx->u.sha.ipad[i] = ctx->u.sha.key[i] ^ HMAC_IPAD_VALUE;
+ ctx->u.sha.opad[i] = ctx->u.sha.key[i] ^ HMAC_OPAD_VALUE;
}
sg_init_one(&ctx->u.sha.opad_sg, ctx->u.sha.opad, block_size);
diff --git a/drivers/crypto/ccp/ccp-debugfs.c b/drivers/crypto/ccp/ccp-debugfs.c
new file mode 100644
index 000000000000..3cd6c83754e0
--- /dev/null
+++ b/drivers/crypto/ccp/ccp-debugfs.c
@@ -0,0 +1,344 @@
+/*
+ * AMD Cryptographic Coprocessor (CCP) driver
+ *
+ * Copyright (C) 2017 Advanced Micro Devices, Inc.
+ *
+ * Author: Gary R Hook <gary.hook@amd.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/debugfs.h>
+#include <linux/ccp.h>
+
+#include "ccp-dev.h"
+
+/* DebugFS helpers */
+#define OBUFP (obuf + oboff)
+#define OBUFLEN 512
+#define OBUFSPC (OBUFLEN - oboff)
+#define OSCNPRINTF(fmt, ...) \
+ scnprintf(OBUFP, OBUFSPC, fmt, ## __VA_ARGS__)
+
+#define BUFLEN 63
+
+#define RI_VERSION_NUM 0x0000003F
+#define RI_AES_PRESENT 0x00000040
+#define RI_3DES_PRESENT 0x00000080
+#define RI_SHA_PRESENT 0x00000100
+#define RI_RSA_PRESENT 0x00000200
+#define RI_ECC_PRESENT 0x00000400
+#define RI_ZDE_PRESENT 0x00000800
+#define RI_ZCE_PRESENT 0x00001000
+#define RI_TRNG_PRESENT 0x00002000
+#define RI_ELFC_PRESENT 0x00004000
+#define RI_ELFC_SHIFT 14
+#define RI_NUM_VQM 0x00078000
+#define RI_NVQM_SHIFT 15
+#define RI_NVQM(r) (((r) * RI_NUM_VQM) >> RI_NVQM_SHIFT)
+#define RI_LSB_ENTRIES 0x0FF80000
+#define RI_NLSB_SHIFT 19
+#define RI_NLSB(r) (((r) * RI_LSB_ENTRIES) >> RI_NLSB_SHIFT)
+
+static ssize_t ccp5_debugfs_info_read(struct file *filp, char __user *ubuf,
+ size_t count, loff_t *offp)
+{
+ struct ccp_device *ccp = filp->private_data;
+ unsigned int oboff = 0;
+ unsigned int regval;
+ ssize_t ret;
+ char *obuf;
+
+ if (!ccp)
+ return 0;
+
+ obuf = kmalloc(OBUFLEN, GFP_KERNEL);
+ if (!obuf)
+ return -ENOMEM;
+
+ oboff += OSCNPRINTF("Device name: %s\n", ccp->name);
+ oboff += OSCNPRINTF(" RNG name: %s\n", ccp->rngname);
+ oboff += OSCNPRINTF(" # Queues: %d\n", ccp->cmd_q_count);
+ oboff += OSCNPRINTF(" # Cmds: %d\n", ccp->cmd_count);
+
+ regval = ioread32(ccp->io_regs + CMD5_PSP_CCP_VERSION);
+ oboff += OSCNPRINTF(" Version: %d\n", regval & RI_VERSION_NUM);
+ oboff += OSCNPRINTF(" Engines:");
+ if (regval & RI_AES_PRESENT)
+ oboff += OSCNPRINTF(" AES");
+ if (regval & RI_3DES_PRESENT)
+ oboff += OSCNPRINTF(" 3DES");
+ if (regval & RI_SHA_PRESENT)
+ oboff += OSCNPRINTF(" SHA");
+ if (regval & RI_RSA_PRESENT)
+ oboff += OSCNPRINTF(" RSA");
+ if (regval & RI_ECC_PRESENT)
+ oboff += OSCNPRINTF(" ECC");
+ if (regval & RI_ZDE_PRESENT)
+ oboff += OSCNPRINTF(" ZDE");
+ if (regval & RI_ZCE_PRESENT)
+ oboff += OSCNPRINTF(" ZCE");
+ if (regval & RI_TRNG_PRESENT)
+ oboff += OSCNPRINTF(" TRNG");
+ oboff += OSCNPRINTF("\n");
+ oboff += OSCNPRINTF(" Queues: %d\n",
+ (regval & RI_NUM_VQM) >> RI_NVQM_SHIFT);
+ oboff += OSCNPRINTF("LSB Entries: %d\n",
+ (regval & RI_LSB_ENTRIES) >> RI_NLSB_SHIFT);
+
+ ret = simple_read_from_buffer(ubuf, count, offp, obuf, oboff);
+ kfree(obuf);
+
+ return ret;
+}
+
+/* Return a formatted buffer containing the current
+ * statistics across all queues for a CCP.
+ */
+static ssize_t ccp5_debugfs_stats_read(struct file *filp, char __user *ubuf,
+ size_t count, loff_t *offp)
+{
+ struct ccp_device *ccp = filp->private_data;
+ unsigned long total_xts_aes_ops = 0;
+ unsigned long total_3des_ops = 0;
+ unsigned long total_aes_ops = 0;
+ unsigned long total_sha_ops = 0;
+ unsigned long total_rsa_ops = 0;
+ unsigned long total_ecc_ops = 0;
+ unsigned long total_pt_ops = 0;
+ unsigned long total_ops = 0;
+ unsigned int oboff = 0;
+ ssize_t ret = 0;
+ unsigned int i;
+ char *obuf;
+
+ for (i = 0; i < ccp->cmd_q_count; i++) {
+ struct ccp_cmd_queue *cmd_q = &ccp->cmd_q[i];
+
+ total_ops += cmd_q->total_ops;
+ total_aes_ops += cmd_q->total_aes_ops;
+ total_xts_aes_ops += cmd_q->total_xts_aes_ops;
+ total_3des_ops += cmd_q->total_3des_ops;
+ total_sha_ops += cmd_q->total_sha_ops;
+ total_rsa_ops += cmd_q->total_rsa_ops;
+ total_pt_ops += cmd_q->total_pt_ops;
+ total_ecc_ops += cmd_q->total_ecc_ops;
+ }
+
+ obuf = kmalloc(OBUFLEN, GFP_KERNEL);
+ if (!obuf)
+ return -ENOMEM;
+
+ oboff += OSCNPRINTF("Total Interrupts Handled: %ld\n",
+ ccp->total_interrupts);
+ oboff += OSCNPRINTF(" Total Operations: %ld\n",
+ total_ops);
+ oboff += OSCNPRINTF(" AES: %ld\n",
+ total_aes_ops);
+ oboff += OSCNPRINTF(" XTS AES: %ld\n",
+ total_xts_aes_ops);
+ oboff += OSCNPRINTF(" SHA: %ld\n",
+ total_3des_ops);
+ oboff += OSCNPRINTF(" SHA: %ld\n",
+ total_sha_ops);
+ oboff += OSCNPRINTF(" RSA: %ld\n",
+ total_rsa_ops);
+ oboff += OSCNPRINTF(" Pass-Thru: %ld\n",
+ total_pt_ops);
+ oboff += OSCNPRINTF(" ECC: %ld\n",
+ total_ecc_ops);
+
+ ret = simple_read_from_buffer(ubuf, count, offp, obuf, oboff);
+ kfree(obuf);
+
+ return ret;
+}
+
+/* Reset the counters in a queue
+ */
+static void ccp5_debugfs_reset_queue_stats(struct ccp_cmd_queue *cmd_q)
+{
+ cmd_q->total_ops = 0L;
+ cmd_q->total_aes_ops = 0L;
+ cmd_q->total_xts_aes_ops = 0L;
+ cmd_q->total_3des_ops = 0L;
+ cmd_q->total_sha_ops = 0L;
+ cmd_q->total_rsa_ops = 0L;
+ cmd_q->total_pt_ops = 0L;
+ cmd_q->total_ecc_ops = 0L;
+}
+
+/* A value was written to the stats variable, which
+ * should be used to reset the queue counters across
+ * that device.
+ */
+static ssize_t ccp5_debugfs_stats_write(struct file *filp,
+ const char __user *ubuf,
+ size_t count, loff_t *offp)
+{
+ struct ccp_device *ccp = filp->private_data;
+ int i;
+
+ for (i = 0; i < ccp->cmd_q_count; i++)
+ ccp5_debugfs_reset_queue_stats(&ccp->cmd_q[i]);
+ ccp->total_interrupts = 0L;
+
+ return count;
+}
+
+/* Return a formatted buffer containing the current information
+ * for that queue
+ */
+static ssize_t ccp5_debugfs_queue_read(struct file *filp, char __user *ubuf,
+ size_t count, loff_t *offp)
+{
+ struct ccp_cmd_queue *cmd_q = filp->private_data;
+ unsigned int oboff = 0;
+ unsigned int regval;
+ ssize_t ret;
+ char *obuf;
+
+ if (!cmd_q)
+ return 0;
+
+ obuf = kmalloc(OBUFLEN, GFP_KERNEL);
+ if (!obuf)
+ return -ENOMEM;
+
+ oboff += OSCNPRINTF(" Total Queue Operations: %ld\n",
+ cmd_q->total_ops);
+ oboff += OSCNPRINTF(" AES: %ld\n",
+ cmd_q->total_aes_ops);
+ oboff += OSCNPRINTF(" XTS AES: %ld\n",
+ cmd_q->total_xts_aes_ops);
+ oboff += OSCNPRINTF(" SHA: %ld\n",
+ cmd_q->total_3des_ops);
+ oboff += OSCNPRINTF(" SHA: %ld\n",
+ cmd_q->total_sha_ops);
+ oboff += OSCNPRINTF(" RSA: %ld\n",
+ cmd_q->total_rsa_ops);
+ oboff += OSCNPRINTF(" Pass-Thru: %ld\n",
+ cmd_q->total_pt_ops);
+ oboff += OSCNPRINTF(" ECC: %ld\n",
+ cmd_q->total_ecc_ops);
+
+ regval = ioread32(cmd_q->reg_int_enable);
+ oboff += OSCNPRINTF(" Enabled Interrupts:");
+ if (regval & INT_EMPTY_QUEUE)
+ oboff += OSCNPRINTF(" EMPTY");
+ if (regval & INT_QUEUE_STOPPED)
+ oboff += OSCNPRINTF(" STOPPED");
+ if (regval & INT_ERROR)
+ oboff += OSCNPRINTF(" ERROR");
+ if (regval & INT_COMPLETION)
+ oboff += OSCNPRINTF(" COMPLETION");
+ oboff += OSCNPRINTF("\n");
+
+ ret = simple_read_from_buffer(ubuf, count, offp, obuf, oboff);
+ kfree(obuf);
+
+ return ret;
+}
+
+/* A value was written to the stats variable for a
+ * queue. Reset the queue counters to this value.
+ */
+static ssize_t ccp5_debugfs_queue_write(struct file *filp,
+ const char __user *ubuf,
+ size_t count, loff_t *offp)
+{
+ struct ccp_cmd_queue *cmd_q = filp->private_data;
+
+ ccp5_debugfs_reset_queue_stats(cmd_q);
+
+ return count;
+}
+
+static const struct file_operations ccp_debugfs_info_ops = {
+ .owner = THIS_MODULE,
+ .open = simple_open,
+ .read = ccp5_debugfs_info_read,
+ .write = NULL,
+};
+
+static const struct file_operations ccp_debugfs_queue_ops = {
+ .owner = THIS_MODULE,
+ .open = simple_open,
+ .read = ccp5_debugfs_queue_read,
+ .write = ccp5_debugfs_queue_write,
+};
+
+static const struct file_operations ccp_debugfs_stats_ops = {
+ .owner = THIS_MODULE,
+ .open = simple_open,
+ .read = ccp5_debugfs_stats_read,
+ .write = ccp5_debugfs_stats_write,
+};
+
+static struct dentry *ccp_debugfs_dir;
+static DEFINE_RWLOCK(ccp_debugfs_lock);
+
+#define MAX_NAME_LEN 20
+
+void ccp5_debugfs_setup(struct ccp_device *ccp)
+{
+ struct ccp_cmd_queue *cmd_q;
+ char name[MAX_NAME_LEN + 1];
+ struct dentry *debugfs_info;
+ struct dentry *debugfs_stats;
+ struct dentry *debugfs_q_instance;
+ struct dentry *debugfs_q_stats;
+ unsigned long flags;
+ int i;
+
+ if (!debugfs_initialized())
+ return;
+
+ write_lock_irqsave(&ccp_debugfs_lock, flags);
+ if (!ccp_debugfs_dir)
+ ccp_debugfs_dir = debugfs_create_dir(KBUILD_MODNAME, NULL);
+ write_unlock_irqrestore(&ccp_debugfs_lock, flags);
+ if (!ccp_debugfs_dir)
+ return;
+
+ ccp->debugfs_instance = debugfs_create_dir(ccp->name, ccp_debugfs_dir);
+ if (!ccp->debugfs_instance)
+ return;
+
+ debugfs_info = debugfs_create_file("info", 0400,
+ ccp->debugfs_instance, ccp,
+ &ccp_debugfs_info_ops);
+ if (!debugfs_info)
+ return;
+
+ debugfs_stats = debugfs_create_file("stats", 0600,
+ ccp->debugfs_instance, ccp,
+ &ccp_debugfs_stats_ops);
+ if (!debugfs_stats)
+ return;
+
+ for (i = 0; i < ccp->cmd_q_count; i++) {
+ cmd_q = &ccp->cmd_q[i];
+
+ snprintf(name, MAX_NAME_LEN - 1, "q%d", cmd_q->id);
+
+ debugfs_q_instance =
+ debugfs_create_dir(name, ccp->debugfs_instance);
+ if (!debugfs_q_instance)
+ return;
+
+ debugfs_q_stats =
+ debugfs_create_file("stats", 0600,
+ debugfs_q_instance, cmd_q,
+ &ccp_debugfs_queue_ops);
+ if (!debugfs_q_stats)
+ return;
+ }
+}
+
+void ccp5_debugfs_destroy(void)
+{
+ debugfs_remove_recursive(ccp_debugfs_dir);
+}
diff --git a/drivers/crypto/ccp/ccp-dev-v5.c b/drivers/crypto/ccp/ccp-dev-v5.c
index ccbe32d5dd1c..b10d2d2075cb 100644
--- a/drivers/crypto/ccp/ccp-dev-v5.c
+++ b/drivers/crypto/ccp/ccp-dev-v5.c
@@ -14,6 +14,7 @@
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/kthread.h>
+#include <linux/debugfs.h>
#include <linux/dma-mapping.h>
#include <linux/interrupt.h>
#include <linux/compiler.h>
@@ -231,6 +232,8 @@ static int ccp5_do_cmd(struct ccp5_desc *desc,
int i;
int ret = 0;
+ cmd_q->total_ops++;
+
if (CCP5_CMD_SOC(desc)) {
CCP5_CMD_IOC(desc) = 1;
CCP5_CMD_SOC(desc) = 0;
@@ -282,6 +285,8 @@ static int ccp5_perform_aes(struct ccp_op *op)
union ccp_function function;
u32 key_addr = op->sb_key * LSB_ITEM_SIZE;
+ op->cmd_q->total_aes_ops++;
+
/* Zero out all the fields of the command desc */
memset(&desc, 0, Q_DESC_SIZE);
@@ -325,6 +330,8 @@ static int ccp5_perform_xts_aes(struct ccp_op *op)
union ccp_function function;
u32 key_addr = op->sb_key * LSB_ITEM_SIZE;
+ op->cmd_q->total_xts_aes_ops++;
+
/* Zero out all the fields of the command desc */
memset(&desc, 0, Q_DESC_SIZE);
@@ -364,6 +371,8 @@ static int ccp5_perform_sha(struct ccp_op *op)
struct ccp5_desc desc;
union ccp_function function;
+ op->cmd_q->total_sha_ops++;
+
/* Zero out all the fields of the command desc */
memset(&desc, 0, Q_DESC_SIZE);
@@ -404,6 +413,8 @@ static int ccp5_perform_des3(struct ccp_op *op)
union ccp_function function;
u32 key_addr = op->sb_key * LSB_ITEM_SIZE;
+ op->cmd_q->total_3des_ops++;
+
/* Zero out all the fields of the command desc */
memset(&desc, 0, sizeof(struct ccp5_desc));
@@ -444,6 +455,8 @@ static int ccp5_perform_rsa(struct ccp_op *op)
struct ccp5_desc desc;
union ccp_function function;
+ op->cmd_q->total_rsa_ops++;
+
/* Zero out all the fields of the command desc */
memset(&desc, 0, Q_DESC_SIZE);
@@ -487,6 +500,8 @@ static int ccp5_perform_passthru(struct ccp_op *op)
struct ccp_dma_info *daddr = &op->dst.u.dma;
+ op->cmd_q->total_pt_ops++;
+
memset(&desc, 0, Q_DESC_SIZE);
CCP5_CMD_ENGINE(&desc) = CCP_ENGINE_PASSTHRU;
@@ -543,6 +558,8 @@ static int ccp5_perform_ecc(struct ccp_op *op)
struct ccp5_desc desc;
union ccp_function function;
+ op->cmd_q->total_ecc_ops++;
+
/* Zero out all the fields of the command desc */
memset(&desc, 0, Q_DESC_SIZE);
@@ -592,7 +609,6 @@ static int ccp_find_lsb_regions(struct ccp_cmd_queue *cmd_q, u64 status)
return queues ? 0 : -EINVAL;
}
-
static int ccp_find_and_assign_lsb_to_q(struct ccp_device *ccp,
int lsb_cnt, int n_lsbs,
unsigned long *lsb_pub)
@@ -757,6 +773,7 @@ static irqreturn_t ccp5_irq_handler(int irq, void *data)
struct ccp_device *ccp = dev_get_drvdata(dev);
ccp5_disable_queue_interrupts(ccp);
+ ccp->total_interrupts++;
if (ccp->use_tasklet)
tasklet_schedule(&ccp->irq_tasklet);
else
@@ -956,6 +973,9 @@ static int ccp5_init(struct ccp_device *ccp)
if (ret)
goto e_hwrng;
+ /* Set up debugfs entries */
+ ccp5_debugfs_setup(ccp);
+
return 0;
e_hwrng:
@@ -992,6 +1012,12 @@ static void ccp5_destroy(struct ccp_device *ccp)
/* Remove this device from the list of available units first */
ccp_del_device(ccp);
+ /* We're in the process of tearing down the entire driver;
+ * when all the devices are gone clean up debugfs
+ */
+ if (ccp_present())
+ ccp5_debugfs_destroy();
+
/* Disable and clear interrupts */
ccp5_disable_queue_interrupts(ccp);
for (i = 0; i < ccp->cmd_q_count; i++) {
diff --git a/drivers/crypto/ccp/ccp-dev.c b/drivers/crypto/ccp/ccp-dev.c
index 92d1c6959f08..2506b5025700 100644
--- a/drivers/crypto/ccp/ccp-dev.c
+++ b/drivers/crypto/ccp/ccp-dev.c
@@ -31,8 +31,9 @@
#include "ccp-dev.h"
MODULE_AUTHOR("Tom Lendacky <thomas.lendacky@amd.com>");
+MODULE_AUTHOR("Gary R Hook <gary.hook@amd.com>");
MODULE_LICENSE("GPL");
-MODULE_VERSION("1.0.0");
+MODULE_VERSION("1.1.0");
MODULE_DESCRIPTION("AMD Cryptographic Coprocessor driver");
struct ccp_tasklet_data {
diff --git a/drivers/crypto/ccp/ccp-dev.h b/drivers/crypto/ccp/ccp-dev.h
index 0cb09d0feeaf..a70154ac7405 100644
--- a/drivers/crypto/ccp/ccp-dev.h
+++ b/drivers/crypto/ccp/ccp-dev.h
@@ -70,6 +70,7 @@
#define LSB_PUBLIC_MASK_HI_OFFSET 0x1C
#define LSB_PRIVATE_MASK_LO_OFFSET 0x20
#define LSB_PRIVATE_MASK_HI_OFFSET 0x24
+#define CMD5_PSP_CCP_VERSION 0x100
#define CMD5_Q_CONTROL_BASE 0x0000
#define CMD5_Q_TAIL_LO_BASE 0x0004
@@ -322,6 +323,16 @@ struct ccp_cmd_queue {
/* Interrupt wait queue */
wait_queue_head_t int_queue;
unsigned int int_rcvd;
+
+ /* Per-queue Statistics */
+ unsigned long total_ops;
+ unsigned long total_aes_ops;
+ unsigned long total_xts_aes_ops;
+ unsigned long total_3des_ops;
+ unsigned long total_sha_ops;
+ unsigned long total_rsa_ops;
+ unsigned long total_pt_ops;
+ unsigned long total_ecc_ops;
} ____cacheline_aligned;
struct ccp_device {
@@ -419,6 +430,12 @@ struct ccp_device {
/* DMA caching attribute support */
unsigned int axcache;
+
+ /* Device Statistics */
+ unsigned long total_interrupts;
+
+ /* DebugFS info */
+ struct dentry *debugfs_instance;
};
enum ccp_memtype {
@@ -632,6 +649,9 @@ void ccp_unregister_rng(struct ccp_device *ccp);
int ccp_dmaengine_register(struct ccp_device *ccp);
void ccp_dmaengine_unregister(struct ccp_device *ccp);
+void ccp5_debugfs_setup(struct ccp_device *ccp);
+void ccp5_debugfs_destroy(void);
+
/* Structure for computation functions that are device-specific */
struct ccp_actions {
int (*aes)(struct ccp_op *);
diff --git a/drivers/crypto/ccp/ccp-platform.c b/drivers/crypto/ccp/ccp-platform.c
index 351f28d8c336..e26969e601ad 100644
--- a/drivers/crypto/ccp/ccp-platform.c
+++ b/drivers/crypto/ccp/ccp-platform.c
@@ -44,7 +44,7 @@ static struct ccp_vdata *ccp_get_of_version(struct platform_device *pdev)
if (match && match->data)
return (struct ccp_vdata *)match->data;
#endif
- return 0;
+ return NULL;
}
static struct ccp_vdata *ccp_get_acpi_version(struct platform_device *pdev)
@@ -56,7 +56,7 @@ static struct ccp_vdata *ccp_get_acpi_version(struct platform_device *pdev)
if (match && match->driver_data)
return (struct ccp_vdata *)match->driver_data;
#endif
- return 0;
+ return NULL;
}
static int ccp_get_irq(struct ccp_device *ccp)
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.