linux-kernel - [PATCH v3] fpga: altera-pr-ip: fix unsigned comparison with less than zero

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Message-Id: <20220609140520.42662-1-marpagan@redhat.com>
Date:   Thu,  9 Jun 2022 16:05:19 +0200
From:   Marco Pagani <marpagan@...hat.com>
To:     Moritz Fischer <mdf@...nel.org>, Wu Hao <hao.wu@...el.com>,
        Xu Yilun <yilun.xu@...el.com>, Tom Rix <trix@...hat.com>,
        Matthew Gerlach <matthew.gerlach@...ux.intel.com>,
        Alan Tull <atull@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Marco Pagani <marpagan@...hat.com>, linux-fpga@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v3] fpga: altera-pr-ip: fix unsigned comparison with less than zero

Fix the "comparison with less than zero" warning reported by
cppcheck for the unsigned (size_t) parameter count of the
alt_pr_fpga_write() function.

Fixes: d201cc17a8a3 ("fpga pr ip: Core driver support for Altera Partial Reconfiguration IP")
Reviewed-by: Tom Rix <trix@...hat.com>
Acked-by: Xu Yilun <yilun.xu@...el.com>
Signed-off-by: Marco Pagani <marpagan@...hat.com>
---
Changes v1 -> v2:
- Coding style fix
Changes v2 -> v3:
- Added Fixes tag
---
 drivers/fpga/altera-pr-ip-core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/fpga/altera-pr-ip-core.c b/drivers/fpga/altera-pr-ip-core.c
index be0667968d33..df8671af4a92 100644
--- a/drivers/fpga/altera-pr-ip-core.c
+++ b/drivers/fpga/altera-pr-ip-core.c
@@ -108,7 +108,7 @@ static int alt_pr_fpga_write(struct fpga_manager *mgr, const char *buf,
 	u32 *buffer_32 = (u32 *)buf;
 	size_t i = 0;
 
-	if (count <= 0)
+	if (!count)
 		return -EINVAL;
 
 	/* Write out the complete 32-bit chunks */
-- 
2.35.3