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Message-Id: <1425248883-25367-2-git-send-email-niederp@physik.uni-kl.de> Date: Sun, 1 Mar 2015 23:27:54 +0100 From: Thomas Niederprüm <niederp@...sik.uni-kl.de> To: plagnioj@...osoft.com, tomi.valkeinen@...com, maxime.ripard@...e-electrons.com Cc: linux-fbdev@...r.kernel.org, linux-kernel@...r.kernel.org, Thomas Niederprüm <niederp@...sik.uni-kl.de> Subject: [PATCHv2 01/10] fbdev: ssd1307fb: fix memory address smem_start. the smem_start pointer of the framebuffer info struct needs to hold the physical address rather than the virtual address. This patch fixes a driver crash on mmaping the framebuffer memory due to an access to the memory address. Note however that the memory allocated by kzalloc is not page aligned, while the address presented on a mmap call is aligned to the next page boudary. Signed-off-by: Thomas Niederprüm <niederp@...sik.uni-kl.de> --- drivers/video/fbdev/ssd1307fb.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/video/fbdev/ssd1307fb.c b/drivers/video/fbdev/ssd1307fb.c index f7ed6d9..61e0ce8 100644 --- a/drivers/video/fbdev/ssd1307fb.c +++ b/drivers/video/fbdev/ssd1307fb.c @@ -515,7 +515,7 @@ static int ssd1307fb_probe(struct i2c_client *client, info->var.blue.offset = 0; info->screen_base = (u8 __force __iomem *)vmem; - info->fix.smem_start = (unsigned long)vmem; + info->fix.smem_start = __pa(vmem); info->fix.smem_len = vmem_size; fb_deferred_io_init(info); -- 2.3.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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