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The fbtft_framebuffer_alloc() calls fb_deferred_io_init() before initializing info->fix.smem_len. It is set to zero by the framebuffer_alloc() function. It will trigger a WARN_ON() at the start of fb_deferred_io_init() and the function will not do anything. Fixes: 856082f021a2 ("fbdev: defio: fix the pagelist corruption") Signed-off-by: Peter Suti <peter.suti@streamunlimited.com> Link: https://lore.kernel.org/r/20220727073550.1491126-1-peter.suti@streamunlimited.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
FBTFT ========= Linux Framebuffer drivers for small TFT LCD display modules. The module 'fbtft' makes writing drivers for some of these displays very easy. Development is done on a Raspberry Pi running the Raspbian "wheezy" distribution. INSTALLATION Download kernel sources From Linux 3.15 cd drivers/video/fbdev/fbtft git clone https://github.com/notro/fbtft.git Add to drivers/video/fbdev/Kconfig: source "drivers/video/fbdev/fbtft/Kconfig" Add to drivers/video/fbdev/Makefile: obj-y += fbtft/ Before Linux 3.15 cd drivers/video git clone https://github.com/notro/fbtft.git Add to drivers/video/Kconfig: source "drivers/video/fbtft/Kconfig" Add to drivers/video/Makefile: obj-y += fbtft/ Enable driver(s) in menuconfig and build the kernel See wiki for more information: https://github.com/notro/fbtft/wiki Source: https://github.com/notro/fbtft/