From: Arnd Bergmann Date: Thu, 11 May 2023 10:58:33 +0000 (+0200) Subject: clk: pxa: fix NULL pointer dereference in pxa3xx_clk_update_accr X-Git-Tag: v6.4-rc7~8^2 X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=23200a4c8ac284f8b4263d7cecaefecaa3ad6732;p=tomoyo%2Ftomoyo-test1.git clk: pxa: fix NULL pointer dereference in pxa3xx_clk_update_accr sparse points out an embarrasing bug in an older patch of mine, which uses the register offset instead of an __iomem pointer: drivers/clk/pxa/clk-pxa3xx.c:167:9: sparse: sparse: Using plain integer as NULL pointer Unlike sparse, gcc and clang ignore this bug and fail to warn because a literal '0' is considered a valid representation of a NULL pointer. Fixes: 3c816d950a49 ("ARM: pxa: move clk register definitions to driver") Cc: stable@vger.kernel.org Reported-by: kernel test robot Link: https://lore.kernel.org/oe-kbuild-all/202305111301.RAHohdob-lkp@intel.com/ Signed-off-by: Arnd Bergmann Link: https://lore.kernel.org/r/20230511105845.299859-1-arnd@kernel.org Signed-off-by: Stephen Boyd --- diff --git a/drivers/clk/pxa/clk-pxa3xx.c b/drivers/clk/pxa/clk-pxa3xx.c index 42958a542662..621e298f101a 100644 --- a/drivers/clk/pxa/clk-pxa3xx.c +++ b/drivers/clk/pxa/clk-pxa3xx.c @@ -164,7 +164,7 @@ void pxa3xx_clk_update_accr(u32 disable, u32 enable, u32 xclkcfg, u32 mask) accr &= ~disable; accr |= enable; - writel(accr, ACCR); + writel(accr, clk_regs + ACCR); if (xclkcfg) __asm__("mcr p14, 0, %0, c6, c0, 0\n" : : "r"(xclkcfg));