From: Krzysztof Kozlowski krzysztof.kozlowski@linaro.org
[ Upstream commit 1d9e93fad549bc38f593147479ee063f2872c170 ]
Code should first check for valid value of array offset, then use it as the index. Fixes smatch warning:
drivers/memory/brcmstb_dpfe.c:443 __send_command() error: testing array offset 'cmd' after use.
Fixes: 2f330caff577 ("memory: brcmstb: Add driver for DPFE") Acked-by: Markus Mayer mmayer@broadcom.com Reviewed-by: Florian Fainelli florian.fainelli@broadcom.com Link: https://lore.kernel.org/r/20230513112931.176066-1-krzysztof.kozlowski@linaro... Signed-off-by: Krzysztof Kozlowski krzysztof.kozlowski@linaro.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/memory/brcmstb_dpfe.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/memory/brcmstb_dpfe.c b/drivers/memory/brcmstb_dpfe.c index 76c82e9c8fceb..9339f80b21c50 100644 --- a/drivers/memory/brcmstb_dpfe.c +++ b/drivers/memory/brcmstb_dpfe.c @@ -434,15 +434,17 @@ static void __finalize_command(struct brcmstb_dpfe_priv *priv) static int __send_command(struct brcmstb_dpfe_priv *priv, unsigned int cmd, u32 result[]) { - const u32 *msg = priv->dpfe_api->command[cmd]; void __iomem *regs = priv->regs; unsigned int i, chksum, chksum_idx; + const u32 *msg; int ret = 0; u32 resp;
if (cmd >= DPFE_CMD_MAX) return -1;
+ msg = priv->dpfe_api->command[cmd]; + mutex_lock(&priv->lock);
/* Wait for DCPU to become ready */