linux-kernel - [PATCH 08/33] efi/gop: Factor out locating the gop into a function

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Message-Id: <20200424130531.30518-9-ardb@kernel.org>
Date:   Fri, 24 Apr 2020 15:05:06 +0200
From:   Ard Biesheuvel <ardb@...nel.org>
To:     linux-efi@...r.kernel.org, Ingo Molnar <mingo@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>
Cc:     Ard Biesheuvel <ardb@...nel.org>, linux-kernel@...r.kernel.org,
        Arvind Sankar <nivedita@...m.mit.edu>,
        Atish Patra <atish.patra@....com>,
        Palmer Dabbelt <palmerdabbelt@...gle.com>,
        Zou Wei <zou_wei@...wei.com>
Subject: [PATCH 08/33] efi/gop: Factor out locating the gop into a function

From: Arvind Sankar <nivedita@...m.mit.edu>

Move the loop to find a gop into its own function.

Signed-off-by: Arvind Sankar <nivedita@...m.mit.edu>
Link: https://lore.kernel.org/r/20200320020028.1936003-5-nivedita@alum.mit.edu
Signed-off-by: Ard Biesheuvel <ardb@...nel.org>
---
 drivers/firmware/efi/libstub/gop.c | 23 +++++++++++++++++------
 1 file changed, 17 insertions(+), 6 deletions(-)

diff --git a/drivers/firmware/efi/libstub/gop.c b/drivers/firmware/efi/libstub/gop.c
index d692b8c65813..92abcf558845 100644
--- a/drivers/firmware/efi/libstub/gop.c
+++ b/drivers/firmware/efi/libstub/gop.c
@@ -85,19 +85,17 @@ setup_pixel_info(struct screen_info *si, u32 pixels_per_scan_line,
 	}
 }
 
-static efi_status_t setup_gop(struct screen_info *si, efi_guid_t *proto,
-			      unsigned long size, void **handles)
+static efi_graphics_output_protocol_t *
+find_gop(efi_guid_t *proto, unsigned long size, void **handles)
 {
 	efi_graphics_output_protocol_t *gop, *first_gop;
 	efi_graphics_output_protocol_mode_t *mode;
 	efi_graphics_output_mode_info_t *info = NULL;
-	efi_physical_addr_t fb_base;
 	efi_status_t status;
 	efi_handle_t h;
 	int i;
 
 	first_gop = NULL;
-	gop = NULL;
 
 	for_each_efi_handle(h, handles, size, i) {
 		efi_guid_t conout_proto = EFI_CONSOLE_OUT_DEVICE_GUID;
@@ -134,12 +132,25 @@ static efi_status_t setup_gop(struct screen_info *si, efi_guid_t *proto,
 		}
 	}
 
+	return first_gop;
+}
+
+static efi_status_t setup_gop(struct screen_info *si, efi_guid_t *proto,
+			      unsigned long size, void **handles)
+{
+	efi_graphics_output_protocol_t *gop;
+	efi_graphics_output_protocol_mode_t *mode;
+	efi_graphics_output_mode_info_t *info = NULL;
+	efi_physical_addr_t fb_base;
+
+	gop = find_gop(proto, size, handles);
+
 	/* Did we find any GOPs? */
-	if (!first_gop)
+	if (!gop)
 		return EFI_NOT_FOUND;
 
 	/* EFI framebuffer */
-	mode = efi_table_attr(first_gop, mode);
+	mode = efi_table_attr(gop, mode);
 	info = efi_table_attr(mode, info);
 
 	si->orig_video_isVGA = VIDEO_TYPE_EFI;
-- 
2.17.1