The patch titled atmel-lcdc: fix pixclock upper bound detection has been added to the -mm tree. Its filename is atmel-lcdc-fix-pixclock-upper-bound-detection.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/SubmitChecklist when testing your code *** See http://userweb.kernel.org/~akpm/stuff/added-to-mm.txt to find out what to do about this The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/ ------------------------------------------------------ Subject: atmel-lcdc: fix pixclock upper bound detection From: Ben Nizette <bn@xxxxxxxxxxxxxxx> AFAICT the code which checks that the requested pixclock value is within bounds is incorrect. It ensures that the lcdc core clock is at least (bytes per pixel) times higher than the pixel clock rather than just greater than or equal to. There are tighter restrictions on the pixclock value as a function of bus width for STN panels but even then it isn't a simple relationship as currently checked for. IMO either something like the below patch should be applied or else more detailed checking logic should be implemented which takes in to account the panel type as well. Signed-off-by: Ben Nizette <bn@xxxxxxxxxxxxxxx> Cc: Nicolas Ferre <nicolas.ferre@xxxxxxxxx> Cc: Haavard Skinnemoen <haavard.skinnemoen@xxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- drivers/video/atmel_lcdfb.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff -puN drivers/video/atmel_lcdfb.c~atmel-lcdc-fix-pixclock-upper-bound-detection drivers/video/atmel_lcdfb.c --- a/drivers/video/atmel_lcdfb.c~atmel-lcdc-fix-pixclock-upper-bound-detection +++ a/drivers/video/atmel_lcdfb.c @@ -351,7 +351,7 @@ static int atmel_lcdfb_check_var(struct dev_dbg(dev, " bpp: %u\n", var->bits_per_pixel); dev_dbg(dev, " clk: %lu KHz\n", clk_value_khz); - if ((PICOS2KHZ(var->pixclock) * var->bits_per_pixel / 8) > clk_value_khz) { + if (PICOS2KHZ(var->pixclock) > clk_value_khz) { dev_err(dev, "%lu KHz pixel clock is too fast\n", PICOS2KHZ(var->pixclock)); return -EINVAL; } _ Patches currently in -mm which might be from bn@xxxxxxxxxxxxxxx are linux-next.patch atmel-lcdc-fix-pixclock-upper-bound-detection.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html