diff options
| author | Michal Suchanek <hramrach@gmail.com> | 2016-06-09 15:08:42 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-08-21 17:52:47 +0200 |
| commit | 175f5a4130b20e25b34d9f9b0bb4cfe80ee49d88 (patch) | |
| tree | bf5b50d905015dd6ee08984780ee5f9097265e72 /drivers/staging/fbtft/fbtft-core.c | |
| parent | d2805d7fff5ba1db3accd5ef010f9fdbb1925f08 (diff) | |
staging: fbtft: do not allocate huge txbuf
txbuflen can be set to arbitrary value by user and it is also set
automagically to the maximum transfer size of the SPI master controller.
Do not allocate the buffer when larger than vmem. When my SPI master
controller reports maximum transfer size 16M the probe of fbtft fails.
Signed-off-by: Michal Suchanek <hramrach@gmail.com>
Acked-by: Noralf Trønnes <noralf@tronnes.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/fbtft/fbtft-core.c')
| -rw-r--r-- | drivers/staging/fbtft/fbtft-core.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/staging/fbtft/fbtft-core.c b/drivers/staging/fbtft/fbtft-core.c index 0c1a77cafe14..ce4fd374c3d0 100644 --- a/drivers/staging/fbtft/fbtft-core.c +++ b/drivers/staging/fbtft/fbtft-core.c @@ -820,6 +820,8 @@ struct fb_info *fbtft_framebuffer_alloc(struct fbtft_display *display, /* Transmit buffer */ if (txbuflen == -1) txbuflen = vmem_size + 2; /* add in case startbyte is used */ + if (txbuflen >= vmem_size + 2) + txbuflen = 0; #ifdef __LITTLE_ENDIAN if ((!txbuflen) && (bpp > 8)) |