mirror of https://lore.kernel.org/lkml/
 help / color / mirror / Atom feed
From: Simon Horman <horms@kernel.org>
To: Bjorn Andersson <andersson@kernel.org>,
	Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Dan Carpenter <error27@gmail.com>,
	linux-remoteproc@vger.kernel.org, linux-kernel@vger.kernel.org,
	kernel test robot <lkp@intel.com>,
	Simon Horman <horms@kernel.org>
Subject: [PATCH] remoteproc: pru: remove always true check positive unsigned value
Date: Tue, 04 Apr 2023 14:44:53 +0200	[thread overview]
Message-ID: <20230404-pru-always-true-v1-1-b1b55eeff188@kernel.org> (raw)

In both cases they type of da is u32. And PRU_PDRAM_DA is 0.
So the check da >= PRU_PDRAM_DA is always true and can be removed.

Flagged by Smatch:

 drivers/remoteproc/pru_rproc.c:660 pru_d_da_to_va() warn: always true condition '(da >= 0) => (0-u32max >= 0)'
 drivers/remoteproc/pru_rproc.c:709 pru_i_da_to_va() warn: always true condition '(da >= 0) => (0-u32max >= 0)'

No functional changes intended.
Compile tested only.

Reported-by: kernel test robot <lkp@intel.com>
Link: https://www.spinics.net/lists/kernel/msg4025983.html
Signed-off-by: Simon Horman <horms@kernel.org>
---
 drivers/remoteproc/pru_rproc.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/remoteproc/pru_rproc.c b/drivers/remoteproc/pru_rproc.c
index b76db7fa693d..095f66130f48 100644
--- a/drivers/remoteproc/pru_rproc.c
+++ b/drivers/remoteproc/pru_rproc.c
@@ -657,7 +657,7 @@ static void *pru_d_da_to_va(struct pru_rproc *pru, u32 da, size_t len)
 		swap(dram0, dram1);
 	shrd_ram = pruss->mem_regions[PRUSS_MEM_SHRD_RAM2];
 
-	if (da >= PRU_PDRAM_DA && da + len <= PRU_PDRAM_DA + dram0.size) {
+	if (da + len <= PRU_PDRAM_DA + dram0.size) {
 		offset = da - PRU_PDRAM_DA;
 		va = (__force void *)(dram0.va + offset);
 	} else if (da >= PRU_SDRAM_DA &&
@@ -706,8 +706,7 @@ static void *pru_i_da_to_va(struct pru_rproc *pru, u32 da, size_t len)
 	 */
 	da &= 0xfffff;
 
-	if (da >= PRU_IRAM_DA &&
-	    da + len <= PRU_IRAM_DA + pru->mem_regions[PRU_IOMEM_IRAM].size) {
+	if (da + len <= PRU_IRAM_DA + pru->mem_regions[PRU_IOMEM_IRAM].size) {
 		offset = da - PRU_IRAM_DA;
 		va = (__force void *)(pru->mem_regions[PRU_IOMEM_IRAM].va +
 				      offset);


             reply	other threads:[~2023-04-04 12:45 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-04-04 12:44 Simon Horman [this message]
2023-04-04 12:51 ` Mukesh Ojha
2023-04-05 16:59 ` Mathieu Poirier

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20230404-pru-always-true-v1-1-b1b55eeff188@kernel.org \
    --to=horms@kernel.org \
    --cc=andersson@kernel.org \
    --cc=error27@gmail.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-remoteproc@vger.kernel.org \
    --cc=lkp@intel.com \
    --cc=mathieu.poirier@linaro.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox

all inboxes | Powered by JetHome®