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path: root/drivers/usb/gadget/file_storage.c
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Diffstat (limited to 'drivers/usb/gadget/file_storage.c')
-rw-r--r--drivers/usb/gadget/file_storage.c78
1 files changed, 49 insertions, 29 deletions
diff --git a/drivers/usb/gadget/file_storage.c b/drivers/usb/gadget/file_storage.c
index f7e39b0365ce..47766f0e7caa 100644
--- a/drivers/usb/gadget/file_storage.c
+++ b/drivers/usb/gadget/file_storage.c
@@ -303,16 +303,16 @@ MODULE_LICENSE("Dual BSD/GPL");
static struct {
char *file[FSG_MAX_LUNS];
char *serial;
- int ro[FSG_MAX_LUNS];
- int nofua[FSG_MAX_LUNS];
+ bool ro[FSG_MAX_LUNS];
+ bool nofua[FSG_MAX_LUNS];
unsigned int num_filenames;
unsigned int num_ros;
unsigned int num_nofuas;
unsigned int nluns;
- int removable;
- int can_stall;
- int cdrom;
+ bool removable;
+ bool can_stall;
+ bool cdrom;
char *transport_parm;
char *protocol_parm;
@@ -859,7 +859,7 @@ static int class_setup_req(struct fsg_dev *fsg,
if (ctrl->bRequestType != (USB_DIR_OUT |
USB_TYPE_CLASS | USB_RECIP_INTERFACE))
break;
- if (w_index != 0 || w_value != 0) {
+ if (w_index != 0 || w_value != 0 || w_length != 0) {
value = -EDOM;
break;
}
@@ -875,7 +875,7 @@ static int class_setup_req(struct fsg_dev *fsg,
if (ctrl->bRequestType != (USB_DIR_IN |
USB_TYPE_CLASS | USB_RECIP_INTERFACE))
break;
- if (w_index != 0 || w_value != 0) {
+ if (w_index != 0 || w_value != 0 || w_length != 1) {
value = -EDOM;
break;
}
@@ -2297,19 +2297,17 @@ static int check_command(struct fsg_dev *fsg, int cmnd_size,
DBG(fsg, "using LUN %d from CBW, "
"not LUN %d from CDB\n",
fsg->lun, lun);
- } else
- fsg->lun = lun; // Use LUN from the command
+ }
/* Check the LUN */
- if (fsg->lun < fsg->nluns) {
- fsg->curlun = curlun = &fsg->luns[fsg->lun];
+ curlun = fsg->curlun;
+ if (curlun) {
if (fsg->cmnd[0] != REQUEST_SENSE) {
curlun->sense_data = SS_NO_SENSE;
curlun->sense_data_info = 0;
curlun->info_valid = 0;
}
} else {
- fsg->curlun = curlun = NULL;
fsg->bad_lun_okay = 0;
/* INQUIRY and REQUEST SENSE commands are explicitly allowed
@@ -2351,6 +2349,16 @@ static int check_command(struct fsg_dev *fsg, int cmnd_size,
return 0;
}
+/* wrapper of check_command for data size in blocks handling */
+static int check_command_size_in_blocks(struct fsg_dev *fsg, int cmnd_size,
+ enum data_direction data_dir, unsigned int mask,
+ int needs_medium, const char *name)
+{
+ if (fsg->curlun)
+ fsg->data_size_from_cmnd <<= fsg->curlun->blkbits;
+ return check_command(fsg, cmnd_size, data_dir,
+ mask, needs_medium, name);
+}
static int do_scsi_command(struct fsg_dev *fsg)
{
@@ -2425,26 +2433,27 @@ static int do_scsi_command(struct fsg_dev *fsg)
case READ_6:
i = fsg->cmnd[4];
- fsg->data_size_from_cmnd = (i == 0 ? 256 : i) << fsg->curlun->blkbits;
- if ((reply = check_command(fsg, 6, DATA_DIR_TO_HOST,
+ fsg->data_size_from_cmnd = (i == 0) ? 256 : i;
+ if ((reply = check_command_size_in_blocks(fsg, 6,
+ DATA_DIR_TO_HOST,
(7<<1) | (1<<4), 1,
"READ(6)")) == 0)
reply = do_read(fsg);
break;
case READ_10:
- fsg->data_size_from_cmnd =
- get_unaligned_be16(&fsg->cmnd[7]) << fsg->curlun->blkbits;
- if ((reply = check_command(fsg, 10, DATA_DIR_TO_HOST,
+ fsg->data_size_from_cmnd = get_unaligned_be16(&fsg->cmnd[7]);
+ if ((reply = check_command_size_in_blocks(fsg, 10,
+ DATA_DIR_TO_HOST,
(1<<1) | (0xf<<2) | (3<<7), 1,
"READ(10)")) == 0)
reply = do_read(fsg);
break;
case READ_12:
- fsg->data_size_from_cmnd =
- get_unaligned_be32(&fsg->cmnd[6]) << fsg->curlun->blkbits;
- if ((reply = check_command(fsg, 12, DATA_DIR_TO_HOST,
+ fsg->data_size_from_cmnd = get_unaligned_be32(&fsg->cmnd[6]);
+ if ((reply = check_command_size_in_blocks(fsg, 12,
+ DATA_DIR_TO_HOST,
(1<<1) | (0xf<<2) | (0xf<<6), 1,
"READ(12)")) == 0)
reply = do_read(fsg);
@@ -2529,26 +2538,27 @@ static int do_scsi_command(struct fsg_dev *fsg)
case WRITE_6:
i = fsg->cmnd[4];
- fsg->data_size_from_cmnd = (i == 0 ? 256 : i) << fsg->curlun->blkbits;
- if ((reply = check_command(fsg, 6, DATA_DIR_FROM_HOST,
+ fsg->data_size_from_cmnd = (i == 0) ? 256 : i;
+ if ((reply = check_command_size_in_blocks(fsg, 6,
+ DATA_DIR_FROM_HOST,
(7<<1) | (1<<4), 1,
"WRITE(6)")) == 0)
reply = do_write(fsg);
break;
case WRITE_10:
- fsg->data_size_from_cmnd =
- get_unaligned_be16(&fsg->cmnd[7]) << fsg->curlun->blkbits;
- if ((reply = check_command(fsg, 10, DATA_DIR_FROM_HOST,
+ fsg->data_size_from_cmnd = get_unaligned_be16(&fsg->cmnd[7]);
+ if ((reply = check_command_size_in_blocks(fsg, 10,
+ DATA_DIR_FROM_HOST,
(1<<1) | (0xf<<2) | (3<<7), 1,
"WRITE(10)")) == 0)
reply = do_write(fsg);
break;
case WRITE_12:
- fsg->data_size_from_cmnd =
- get_unaligned_be32(&fsg->cmnd[6]) << fsg->curlun->blkbits;
- if ((reply = check_command(fsg, 12, DATA_DIR_FROM_HOST,
+ fsg->data_size_from_cmnd = get_unaligned_be32(&fsg->cmnd[6]);
+ if ((reply = check_command_size_in_blocks(fsg, 12,
+ DATA_DIR_FROM_HOST,
(1<<1) | (0xf<<2) | (0xf<<6), 1,
"WRITE(12)")) == 0)
reply = do_write(fsg);
@@ -2715,7 +2725,17 @@ static int get_next_command(struct fsg_dev *fsg)
memcpy(fsg->cmnd, fsg->cbbuf_cmnd, fsg->cmnd_size);
fsg->cbbuf_cmnd_size = 0;
spin_unlock_irq(&fsg->lock);
+
+ /* Use LUN from the command */
+ fsg->lun = fsg->cmnd[1] >> 5;
}
+
+ /* Update current lun */
+ if (fsg->lun >= 0 && fsg->lun < fsg->nluns)
+ fsg->curlun = &fsg->luns[fsg->lun];
+ else
+ fsg->curlun = NULL;
+
return rc;
}
@@ -3584,7 +3604,7 @@ static void fsg_resume(struct usb_gadget *gadget)
/*-------------------------------------------------------------------------*/
static struct usb_gadget_driver fsg_driver = {
- .speed = USB_SPEED_SUPER,
+ .max_speed = USB_SPEED_SUPER,
.function = (char *) fsg_string_product,
.unbind = fsg_unbind,
.disconnect = fsg_disconnect,
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.