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nb/intel/x4x: Fix uninitialized variable issue 

A left-over from 5e3cb72a71 (nb/x4x: Do not enable IGD when not
supported). Should fix coverity issue 1375009. Remove a redundant
line that uses the variable `gfxsize` out of its scope and move the
variable declaration. Make sure the variable is always initialized,
drop unneeded error-handling for `get_option()` and sanitize the
read value instead.

Change-Id: Iee2beda30d8c74df0f412622c3ff3357819e386b
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: https://review.coreboot.org/19680
Reviewed-by: Philippe Mathieu-Daudé <philippe.mathieu.daude@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
This commit is contained in:
Nico Huber 2017-05-12 17:10:58 +02:00 committed by Nico Huber
parent dd2e35edc1
commit cfd433b96d
1 changed files with 5 additions and 8 deletions
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13
src/northbridge/intel/x4x/early_init.c
View File

@ -27,7 +27,6 @@
void x4x_early_init(void)
{
u8 gfxsize;
const pci_devfn_t d0f0 = PCI_DEV(0, 0, 0);
/* Setup MCHBAR. */
@ -58,19 +57,17 @@ void x4x_early_init(void)
if (!(pci_read_config32(d0f0, D0F0_CAPID0 + 4) & (1 << (46 - 32)))) {
/* Enable internal GFX */
pci_write_config32(d0f0, D0F0_DEVEN, BOARD_DEVEN);
/* Set preallocated IGD size from cmos */
if (get_option(&gfxsize, "gfx_uma_size") != CB_SUCCESS) {
/* 6 for 64MB, default if not set in cmos */
/* Set preallocated IGD size from cmos */
u8 gfxsize = 6; /* 6 for 64MiB, default if not set in cmos */
get_option(&gfxsize, "gfx_uma_size");
if (gfxsize > 12)
gfxsize = 6;
}
pci_write_config16(d0f0, D0F0_GGC,
0x0100 | ((gfxsize + 1) << 4));
pci_write_config16(d0f0, D0F0_GGC, 0x0100 | (gfxsize + 1) << 4);
} else { /* Does not feature internal graphics */
pci_write_config32(d0f0, D0F0_DEVEN, D0EN | D1EN | PEG1EN);
pci_write_config16(d0f0, D0F0_GGC, (1 << 1));
}
pci_write_config16(d0f0, D0F0_GGC, 0x0100 | ((gfxsize + 1) << 4));
}
static void init_egress(void)