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authorMatthew R. Ochs <mrochs@linux.vnet.ibm.com>2017-10-25 16:36:29 -0500
committerMartin K. Petersen <martin.petersen@oracle.com>2017-10-31 12:28:04 -0400
commitd84c198f43c50c6c0bd57571acbf0f000165bd56 (patch)
tree3dee94bd38d2eda955ee889eef5cea70868754b3 /drivers/scsi/cxlflash
parent0d4191305e69e42b3f7f11bbcf077d1d42929f94 (diff)
scsi: cxlflash: Derive pid through accessors
The cxlflash driver tracks process IDs alongside contexts to validate context ownership. Currently, the process IDs are derived by directly accessing values from the 'current' task pointer. While this method of access is fine for the current process, it is incorrect when the parent process ID is needed as the access requires serialization. To address the incorrect issue and provide a consistent means of deriving the process ID within the cxlflash driver, use the task accessors defined linux/sched.h. Signed-off-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com> Signed-off-by: Uma Krishnan <ukrishn@linux.vnet.ibm.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/cxlflash')
-rw-r--r--drivers/scsi/cxlflash/superpipe.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/scsi/cxlflash/superpipe.c b/drivers/scsi/cxlflash/superpipe.c
index ed46e8df2e42..170fff5aeff6 100644
--- a/drivers/scsi/cxlflash/superpipe.c
+++ b/drivers/scsi/cxlflash/superpipe.c
@@ -165,7 +165,7 @@ struct ctx_info *get_context(struct cxlflash_cfg *cfg, u64 rctxid,
struct llun_info *lli = arg;
u64 ctxid = DECODE_CTXID(rctxid);
int rc;
- pid_t pid = current->tgid, ctxpid = 0;
+ pid_t pid = task_tgid_nr(current), ctxpid = 0;
if (ctx_ctrl & CTX_CTRL_FILE) {
lli = NULL;
@@ -173,7 +173,7 @@ struct ctx_info *get_context(struct cxlflash_cfg *cfg, u64 rctxid,
}
if (ctx_ctrl & CTX_CTRL_CLONE)
- pid = current->parent->tgid;
+ pid = task_ppid_nr(current);
if (likely(ctxid < MAX_CONTEXT)) {
while (true) {
@@ -824,7 +824,7 @@ static void init_context(struct ctx_info *ctxi, struct cxlflash_cfg *cfg,
ctxi->rht_perms = perms;
ctxi->ctrl_map = &afu->afu_map->ctrls[ctxid].ctrl;
ctxi->ctxid = ENCODE_CTXID(ctxi, ctxid);
- ctxi->pid = current->tgid; /* tgid = pid */
+ ctxi->pid = task_tgid_nr(current); /* tgid = pid */
ctxi->ctx = ctx;
ctxi->cfg = cfg;
ctxi->file = file;