From: Ard Biesheuvel <ardb@kernel.org>
To: linux-efi@vger.kernel.org, Ingo Molnar <mingo@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>
Cc: Ard Biesheuvel <ardb@kernel.org>,
linux-kernel@vger.kernel.org,
Arvind Sankar <nivedita@alum.mit.edu>,
Atish Patra <atish.patra@wdc.com>,
Palmer Dabbelt <palmerdabbelt@google.com>,
Zou Wei <zou_wei@huawei.com>
Subject: [PATCH 13/33] efi/gop: Remove unreachable code from setup_pixel_info
Date: Fri, 24 Apr 2020 15:05:11 +0200 [thread overview]
Message-ID: <20200424130531.30518-14-ardb@kernel.org> (raw)
In-Reply-To: <20200424130531.30518-1-ardb@kernel.org>
From: Arvind Sankar <nivedita@alum.mit.edu>
pixel_format must be one of
PIXEL_RGB_RESERVED_8BIT_PER_COLOR
PIXEL_BGR_RESERVED_8BIT_PER_COLOR
PIXEL_BIT_MASK
since we skip PIXEL_BLT_ONLY when finding a gop.
Remove the redundant code and add another check in find_gop to skip any
pixel formats that we don't know about, in case a later version of the
UEFI spec adds one.
Reformat the code a little.
Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Link: https://lore.kernel.org/r/20200320020028.1936003-10-nivedita@alum.mit.edu
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
---
drivers/firmware/efi/libstub/gop.c | 66 ++++++++++++------------------
1 file changed, 26 insertions(+), 40 deletions(-)
diff --git a/drivers/firmware/efi/libstub/gop.c b/drivers/firmware/efi/libstub/gop.c
index 8bf424f35759..2d91699e3061 100644
--- a/drivers/firmware/efi/libstub/gop.c
+++ b/drivers/firmware/efi/libstub/gop.c
@@ -29,49 +29,34 @@ static void
setup_pixel_info(struct screen_info *si, u32 pixels_per_scan_line,
efi_pixel_bitmask_t pixel_info, int pixel_format)
{
- if (pixel_format == PIXEL_RGB_RESERVED_8BIT_PER_COLOR) {
- si->lfb_depth = 32;
- si->lfb_linelength = pixels_per_scan_line * 4;
- si->red_size = 8;
- si->red_pos = 0;
- si->green_size = 8;
- si->green_pos = 8;
- si->blue_size = 8;
- si->blue_pos = 16;
- si->rsvd_size = 8;
- si->rsvd_pos = 24;
- } else if (pixel_format == PIXEL_BGR_RESERVED_8BIT_PER_COLOR) {
- si->lfb_depth = 32;
- si->lfb_linelength = pixels_per_scan_line * 4;
- si->red_size = 8;
- si->red_pos = 16;
- si->green_size = 8;
- si->green_pos = 8;
- si->blue_size = 8;
- si->blue_pos = 0;
- si->rsvd_size = 8;
- si->rsvd_pos = 24;
- } else if (pixel_format == PIXEL_BIT_MASK) {
- find_bits(pixel_info.red_mask, &si->red_pos, &si->red_size);
- find_bits(pixel_info.green_mask, &si->green_pos,
- &si->green_size);
- find_bits(pixel_info.blue_mask, &si->blue_pos, &si->blue_size);
- find_bits(pixel_info.reserved_mask, &si->rsvd_pos,
- &si->rsvd_size);
+ if (pixel_format == PIXEL_BIT_MASK) {
+ find_bits(pixel_info.red_mask,
+ &si->red_pos, &si->red_size);
+ find_bits(pixel_info.green_mask,
+ &si->green_pos, &si->green_size);
+ find_bits(pixel_info.blue_mask,
+ &si->blue_pos, &si->blue_size);
+ find_bits(pixel_info.reserved_mask,
+ &si->rsvd_pos, &si->rsvd_size);
si->lfb_depth = si->red_size + si->green_size +
si->blue_size + si->rsvd_size;
si->lfb_linelength = (pixels_per_scan_line * si->lfb_depth) / 8;
} else {
- si->lfb_depth = 4;
- si->lfb_linelength = si->lfb_width / 2;
- si->red_size = 0;
- si->red_pos = 0;
- si->green_size = 0;
- si->green_pos = 0;
- si->blue_size = 0;
- si->blue_pos = 0;
- si->rsvd_size = 0;
- si->rsvd_pos = 0;
+ if (pixel_format == PIXEL_RGB_RESERVED_8BIT_PER_COLOR) {
+ si->red_pos = 0;
+ si->blue_pos = 16;
+ } else /* PIXEL_BGR_RESERVED_8BIT_PER_COLOR */ {
+ si->blue_pos = 0;
+ si->red_pos = 16;
+ }
+
+ si->green_pos = 8;
+ si->rsvd_pos = 24;
+ si->red_size = si->green_size =
+ si->blue_size = si->rsvd_size = 8;
+
+ si->lfb_depth = 32;
+ si->lfb_linelength = pixels_per_scan_line * 4;
}
}
@@ -100,7 +85,8 @@ find_gop(efi_guid_t *proto, unsigned long size, void **handles)
mode = efi_table_attr(gop, mode);
info = efi_table_attr(mode, info);
- if (info->pixel_format == PIXEL_BLT_ONLY)
+ if (info->pixel_format == PIXEL_BLT_ONLY ||
+ info->pixel_format >= PIXEL_FORMAT_MAX)
continue;
/*
--
2.17.1
next prev parent reply other threads:[~2020-04-24 13:06 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-24 13:04 [GIT PULL 00/33] EFI updates for v5.8 Ard Biesheuvel
2020-04-24 13:04 ` [PATCH 01/33] efi/libstub: Move arm-stub to a common file Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 02/33] efi/libstub: Make initrd file loader configurable Ard Biesheuvel
2020-04-24 13:15 ` Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 03/33] efi/libstub: Unify EFI call wrappers for non-x86 Ard Biesheuvel
2020-05-03 15:09 ` Guenter Roeck
2020-05-03 16:09 ` Arvind Sankar
2020-05-03 16:11 ` Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 04/33] efi/libstub/arm: Make install_memreserve_table static Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 05/33] efi/gop: Remove redundant current_fb_base Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 06/33] efi/gop: Move check for framebuffer before con_out Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 07/33] efi/gop: Get mode information outside the loop Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 08/33] efi/gop: Factor out locating the gop into a function Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 09/33] efi/gop: Slightly re-arrange logic of find_gop Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 10/33] efi/gop: Move variable declarations into loop block Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 11/33] efi/gop: Use helper macros for populating lfb_base Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 12/33] efi/gop: Use helper macros for find_bits Ard Biesheuvel
2020-04-24 13:05 ` Ard Biesheuvel [this message]
2020-04-24 13:05 ` [PATCH 14/33] efi/gop: Add prototypes for query_mode and set_mode Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 15/33] efi/gop: Allow specifying mode number on command line Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 16/33] efi/gop: Allow specifying mode by <xres>x<yres> Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 17/33] efi/gop: Allow specifying depth as well as resolution Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 18/33] efi/gop: Allow automatically choosing the best mode Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 19/33] efi/libstub/random: Align allocate size to EFI_ALLOC_ALIGN Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 20/33] efi/libstub/random: Increase random alloc granularity Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 21/33] efi/libstub/arm64: Replace 'preferred' offset with alignment check Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 22/33] efi/libstub/arm64: Simplify randomized loading of kernel image Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 23/33] efi/libstub: Add API function to allocate aligned memory Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 24/33] efi/libstub/arm64: Switch to ordinary page allocator for kernel image Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 25/33] efi/libstub: Move efi_relocate_kernel() into separate source file Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 26/33] efi/arm: Remove __efistub_global annotation Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 27/33] efi/x86: Remove __efistub_global and add relocation check Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 28/33] efi: Kill __efistub_global Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 29/33] efi/libstub: Drop __pure getter for efi_system_table Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 30/33] efi/libstub: Drop __pure getters for EFI stub options Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 31/33] efi/libstub/x86: Avoid getter function for efi_is64 Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 32/33] efi: Clean up config table description arrays Ard Biesheuvel
2020-04-24 13:05 ` [PATCH 33/33] efi: Move arch_tables check to caller Ard Biesheuvel
2020-04-25 8:27 ` [GIT PULL 00/33] EFI updates for v5.8 Ingo Molnar
2020-04-25 9:57 ` Ard Biesheuvel
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