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video: hgafb: fix potential NULL pointer dereference
When ioremap fails, hga_vram should not be dereferenced. The fix check the failure to avoid NULL pointer dereference. Signed-off-by: Kangjie Lu <kjlu@umn.edu> Cc: Aditya Pakki <pakki001@umn.edu> Cc: Ferenc Bakonyi <fero@drama.obuda.kando.hu> [b.zolnierkie: minor patch summary fixup] Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
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@ -285,6 +285,8 @@ static int hga_card_detect(void)
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hga_vram_len = 0x08000;
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hga_vram = ioremap(0xb0000, hga_vram_len);
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if (!hga_vram)
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goto error;
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if (request_region(0x3b0, 12, "hgafb"))
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release_io_ports = 1;
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