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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,
	Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
	Arvind Sankar <nivedita@alum.mit.edu>,
	Bhupesh Sharma <bhsharma@redhat.com>,
	Masayoshi Mizuma <m.mizuma@jp.fujitsu.com>
Subject: [PATCH 3/6] efi/gop: Return EFI_SUCCESS if a usable GOP was found
Date: Fri,  6 Dec 2019 16:55:39 +0000
Message-ID: <20191206165542.31469-4-ardb@kernel.org> (raw)
In-Reply-To: <20191206165542.31469-1-ardb@kernel.org>

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

If we've found a usable instance of the Graphics Output Protocol
(GOP) with a framebuffer, it is possible that one of the later EFI
calls fails while checking if any support console output. In this
case status may be an EFI error code even though we found a usable
GOP.

Fix this by explicitly return EFI_SUCCESS if a usable GOP has been
located.

Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
---
 drivers/firmware/efi/libstub/gop.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/firmware/efi/libstub/gop.c b/drivers/firmware/efi/libstub/gop.c
index 08f3c1a2fb48..69b2b019a1d0 100644
--- a/drivers/firmware/efi/libstub/gop.c
+++ b/drivers/firmware/efi/libstub/gop.c
@@ -198,7 +198,7 @@ setup_gop32(efi_system_table_t *sys_table_arg, struct screen_info *si,
 
 	si->capabilities |= VIDEO_CAPABILITY_SKIP_QUIRKS;
 
-	return status;
+	return EFI_SUCCESS;
 }
 
 static efi_status_t
@@ -316,7 +316,7 @@ setup_gop64(efi_system_table_t *sys_table_arg, struct screen_info *si,
 
 	si->capabilities |= VIDEO_CAPABILITY_SKIP_QUIRKS;
 
-	return status;
+	return EFI_SUCCESS;
 }
 
 /*
-- 
2.17.1


  parent reply index

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-06 16:55 [GIT PULL 0/6] EFI fixes for v5.5 Ard Biesheuvel
2019-12-06 16:55 ` [PATCH 1/6] efi/memreserve: register reservations as 'reserved' in /proc/iomem Ard Biesheuvel
2019-12-08 13:33   ` [tip: efi/urgent] efi/memreserve: Register " tip-bot2 for Ard Biesheuvel
2019-12-06 16:55 ` [PATCH 2/6] efi/gop: Return EFI_NOT_FOUND if there are no usable GOPs Ard Biesheuvel
2019-12-08 13:33   ` [tip: efi/urgent] " tip-bot2 for Arvind Sankar
2019-12-06 16:55 ` Ard Biesheuvel [this message]
2019-12-08 13:33   ` [tip: efi/urgent] efi/gop: Return EFI_SUCCESS if a usable GOP was found tip-bot2 for Arvind Sankar
2019-12-06 16:55 ` [PATCH 4/6] efi/gop: Fix memory leak from __gop_query32/64 Ard Biesheuvel
2019-12-08 13:33   ` [tip: efi/urgent] efi/gop: Fix memory leak in __gop_query32/64() tip-bot2 for Arvind Sankar
2019-12-06 16:55 ` [PATCH 5/6] efi: fix type of unload field in efi_loaded_image_t Ard Biesheuvel
2019-12-08 13:33   ` [tip: efi/urgent] efi: Fix efi_loaded_image_t::unload type tip-bot2 for Arvind Sankar
2019-12-06 16:55 ` [PATCH 6/6] efi/earlycon: Remap entire framebuffer after page initialization Ard Biesheuvel
2019-12-08 13:33   ` [tip: efi/urgent] " tip-bot2 for Andy Shevchenko
2019-12-09 19:12   ` [PATCH 6/6] " Arvind Sankar
2019-12-09 19:24     ` Ard Biesheuvel
2019-12-10 20:05       ` Arvind Sankar
2019-12-11 11:26         ` Ard Biesheuvel
2019-12-11 15:55           ` Arvind Sankar

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