[PATCH] uvesafb: don't treat mode info retrieval failures as errors
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From: Michal Januszewski <spock@gentoo.org>
Date: 2008-09-21 20:49:58
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Subsystem:
framebuffer layer, the rest · Maintainers:
Helge Deller, Linus Torvalds
From: Michal Januszewski <spock@gentoo.org> Some BIOSes return error codes when queried for information about modes from their own modelist. uvesafb treats this as an error case and bails out. Change this behavior so that broken modes do not prevent the driver from working. Only the failure to retrieve information about any usable video mode is considered to be an error case. Signed-off-by: Michal Januszewski <spock@gentoo.org> ---
diff --git a/drivers/video/uvesafb.c b/drivers/video/uvesafb.c
index 5074422..6c2d37f 100644
--- a/drivers/video/uvesafb.c
+++ b/drivers/video/uvesafb.c@@ -516,10 +516,12 @@ static int __devinit uvesafb_vbe_getmodes(struct uvesafb_ktask *task, err = uvesafb_exec(task); if (err || (task->t.regs.eax & 0xffff) != 0x004f) { - printk(KERN_ERR "uvesafb: Getting mode info block " + printk(KERN_WARNING "uvesafb: Getting mode info block " "for mode 0x%x failed (eax=0x%x, err=%d)\n", *mode, (u32)task->t.regs.eax, err); - return -EINVAL; + mode++; + par->vbe_modes_cnt--; + continue; } mib = task->buf;
@@ -548,7 +550,10 @@ static int __devinit uvesafb_vbe_getmodes(struct uvesafb_ktask *task, mib->depth = mib->bits_per_pixel; } - return 0; + if (par->vbe_modes_cnt > 0) + return 0; + else + return -EINVAL; } /* -------------------------------------------------------------------------
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