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| author |   Alexander Gordeev <agordeev@linux.ibm.com> | 2021-06-18 08:39:12 +0200 |
|---|---|---|
| committer | Alexander Gordeev <agordeev@linux.ibm.com> | 2022-12-01 10:58:04 +0100 |
| commit | 5c2e5a0cf5b12c156b0cb07af43b51627c086480 (patch) | |
| tree | bd5b9271732eff13b5fc28198546086204fdb96a /drivers/s390/cio/device_pgid.c | |
| parent | s390/sclp: allow to change sclp_console_drop during runtime (diff) | |
| download | wireguard-linux-5c2e5a0cf5b12c156b0cb07af43b51627c086480.tar.xz wireguard-linux-5c2e5a0cf5b12c156b0cb07af43b51627c086480.zip | |
s390/cio: sort out physical vs virtual pointers usage
This does not fix a real bug, since virtual addresses
are currently indentical to physical ones.
Use virt_to_phys() for intparm interrupt parameter to
convert a 64-bit virtual address to the 32-bit physical
address, which is expected to be below 2GB.
Reviewed-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Diffstat (limited to 'drivers/s390/cio/device_pgid.c')
| -rw-r--r-- | drivers/s390/cio/device_pgid.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/drivers/s390/cio/device_pgid.c b/drivers/s390/cio/device_pgid.c index 767a85635a0f..3862961697eb 100644 --- a/drivers/s390/cio/device_pgid.c +++ b/drivers/s390/cio/device_pgid.c @@ -14,6 +14,7 @@ #include <linux/types.h> #include <linux/errno.h> #include <linux/slab.h> +#include <linux/io.h> #include <asm/ccwdev.h> #include <asm/cio.h> @@ -140,7 +141,7 @@ static void spid_build_cp(struct ccw_device *cdev, u8 fn) pgid->inf.fc = fn; cp->cmd_code = CCW_CMD_SET_PGID; - cp->cda = (u32) (addr_t) pgid; + cp->cda = (u32)virt_to_phys(pgid); cp->count = sizeof(*pgid); cp->flags = CCW_FLAG_SLI; req->cp = cp; @@ -441,7 +442,7 @@ static void snid_build_cp(struct ccw_device *cdev) /* Channel program setup. */ cp->cmd_code = CCW_CMD_SENSE_PGID; - cp->cda = (u32) (addr_t) &cdev->private->dma_area->pgid[i]; + cp->cda = (u32)virt_to_phys(&cdev->private->dma_area->pgid[i]); cp->count = sizeof(struct pgid); cp->flags = CCW_FLAG_SLI; req->cp = cp; @@ -631,11 +632,11 @@ static void stlck_build_cp(struct ccw_device *cdev, void *buf1, void *buf2) struct ccw1 *cp = cdev->private->dma_area->iccws; cp[0].cmd_code = CCW_CMD_STLCK; - cp[0].cda = (u32) (addr_t) buf1; + cp[0].cda = (u32)virt_to_phys(buf1); cp[0].count = 32; cp[0].flags = CCW_FLAG_CC; cp[1].cmd_code = CCW_CMD_RELEASE; - cp[1].cda = (u32) (addr_t) buf2; + cp[1].cda = (u32)virt_to_phys(buf2); cp[1].count = 32; cp[1].flags = 0; req->cp = cp; @@ -698,7 +699,7 @@ int ccw_device_stlck(struct ccw_device *cdev) init_completion(&data.done); data.rc = -EIO; spin_lock_irq(sch->lock); - rc = cio_enable_subchannel(sch, (u32) (addr_t) sch); + rc = cio_enable_subchannel(sch, (u32)virt_to_phys(sch)); if (rc) goto out_unlock; /* Perform operation. */ |