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From: Arvind Sankar <nivedita@alum.mit.edu>
To: Dan Carpenter <dan.carpenter@oracle.com>
Cc: kbuild@lists.01.org, Arvind Sankar <nivedita@alum.mit.edu>,
	kbuild-all@lists.01.org, Ard Biesheuvel <ardb@kernel.org>,
	linux-efi@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 11/14] efi/gop: Allow specifying mode number on command line
Date: Fri, 20 Mar 2020 13:51:07 -0400
Message-ID: <20200320175104.GA3101477@rani.riverdale.lan> (raw)
In-Reply-To: <20200320143526.GI4650@kadam>

On Fri, Mar 20, 2020 at 05:36:04PM +0300, Dan Carpenter wrote:
> Hi Arvind,
> 
> Thank you for the patch! Perhaps something to improve:
> 
> url:    https://github.com/0day-ci/linux/commits/Arvind-Sankar/efi-gop-Refactoring-mode-setting-feature/20200320-044605
> base:   https://git.kernel.org/pub/scm/linux/kernel/git/efi/efi.git next
> 
> If you fix the issue, kindly add following tag
> Reported-by: kbuild test robot <lkp@intel.com>
> Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
> 
> New smatch warnings:
> drivers/firmware/efi/libstub/gop.c:113 set_mode() error: uninitialized symbol 'new_mode'.
> 
> # https://github.com/0day-ci/linux/commit/af85e496c9f577df9743784171b1cda94220dd8f
> git remote add linux-review https://github.com/0day-ci/linux
> git remote update linux-review
> git checkout af85e496c9f577df9743784171b1cda94220dd8f
> vim +/info +85 drivers/firmware/efi/libstub/gop.c
> 
> af85e496c9f577 Arvind Sankar 2020-03-19   97  static void set_mode(efi_graphics_output_protocol_t *gop)
> af85e496c9f577 Arvind Sankar 2020-03-19   98  {
> af85e496c9f577 Arvind Sankar 2020-03-19   99  	efi_graphics_output_protocol_mode_t *mode;
> af85e496c9f577 Arvind Sankar 2020-03-19  100  	u32 cur_mode, new_mode;
> af85e496c9f577 Arvind Sankar 2020-03-19  101  
> af85e496c9f577 Arvind Sankar 2020-03-19  102  	switch (cmdline.option) {
> af85e496c9f577 Arvind Sankar 2020-03-19  103  	case EFI_CMDLINE_NONE:
> af85e496c9f577 Arvind Sankar 2020-03-19  104  		return;
> af85e496c9f577 Arvind Sankar 2020-03-19  105  	case EFI_CMDLINE_MODE_NUM:
> af85e496c9f577 Arvind Sankar 2020-03-19  106  		new_mode = choose_mode_modenum(gop);
> af85e496c9f577 Arvind Sankar 2020-03-19  107  		break;
> 
> No default case?

Yeah, it's an enum with the only two values covered by the switch cases,
so it's really a bogus warning. I posted a v2 with a default case
instead anyway to silence it.

> 
> af85e496c9f577 Arvind Sankar 2020-03-19  108  	}
> af85e496c9f577 Arvind Sankar 2020-03-19  109  
> af85e496c9f577 Arvind Sankar 2020-03-19  110  	mode = efi_table_attr(gop, mode);
> af85e496c9f577 Arvind Sankar 2020-03-19  111  	cur_mode = efi_table_attr(mode, mode);
> af85e496c9f577 Arvind Sankar 2020-03-19  112  
> af85e496c9f577 Arvind Sankar 2020-03-19 @113  	if (new_mode == cur_mode)
> af85e496c9f577 Arvind Sankar 2020-03-19  114  		return;
> af85e496c9f577 Arvind Sankar 2020-03-19  115  
> af85e496c9f577 Arvind Sankar 2020-03-19  116  	if (efi_call_proto(gop, set_mode, new_mode) != EFI_SUCCESS)
> af85e496c9f577 Arvind Sankar 2020-03-19  117  		efi_printk("Failed to set requested mode\n");
> af85e496c9f577 Arvind Sankar 2020-03-19  118  }
> 
> ---
> 0-DAY CI Kernel Test Service, Intel Corporation
> https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

  reply index

Thread overview: 46+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-19 19:28 [PATCH 00/14] efi/gop: Refactoring + mode-setting feature Arvind Sankar
2020-03-19 19:28 ` [PATCH 01/14] efi/gop: Remove redundant current_fb_base Arvind Sankar
2020-03-19 19:28 ` [PATCH 02/14] efi/gop: Move check for framebuffer before con_out Arvind Sankar
2020-03-19 19:28 ` [PATCH 03/14] efi/gop: Get mode information outside the loop Arvind Sankar
2020-03-19 19:28 ` [PATCH 04/14] efi/gop: Factor out locating the gop into a function Arvind Sankar
2020-03-19 19:28 ` [PATCH 05/14] efi/gop: Slightly re-arrange logic of find_gop Arvind Sankar
2020-03-19 19:28 ` [PATCH 06/14] efi/gop: Move variable declarations into loop block Arvind Sankar
2020-03-19 19:28 ` [PATCH 07/14] efi/gop: Use helper macros for populating lfb_base Arvind Sankar
2020-03-19 19:28 ` [PATCH 08/14] efi/gop: Use helper macros for find_bits Arvind Sankar
2020-03-19 19:28 ` [PATCH 09/14] efi/gop: Remove unreachable code from setup_pixel_info Arvind Sankar
2020-03-19 19:28 ` [PATCH 10/14] efi/gop: Add prototypes for query_mode and set_mode Arvind Sankar
2020-03-19 19:28 ` [PATCH 11/14] efi/gop: Allow specifying mode number on command line Arvind Sankar
2020-03-19 22:53   ` kbuild test robot
2020-03-20  1:09   ` kbuild test robot
2020-03-20 14:36   ` Dan Carpenter
2020-03-20 17:51     ` Arvind Sankar [this message]
2020-03-19 19:28 ` [PATCH 12/14] efi/gop: Allow specifying mode by <xres>x<yres> Arvind Sankar
2020-03-19 19:28 ` [PATCH 13/14] efi/gop: Allow specifying depth as well as resolution Arvind Sankar
2020-03-19 19:28 ` [PATCH 14/14] efi/gop: Allow automatically choosing the best mode Arvind Sankar
2020-03-19 20:02 ` [PATCH 00/14] efi/gop: Refactoring + mode-setting feature Ard Biesheuvel
2020-03-20  2:00 ` [PATCH v2 " Arvind Sankar
2020-03-25 16:41   ` Ard Biesheuvel
2020-03-25 22:10     ` Arvind Sankar
2020-03-25 23:36       ` Ard Biesheuvel
2020-03-26 10:41         ` Ard Biesheuvel
2020-03-28 16:06           ` efi/gop: skip cur_mode in choose_mode_auto Arvind Sankar
2020-03-28 16:06             ` [PATCH v3] efi/gop: Allow automatically choosing the best mode Arvind Sankar
2020-03-29  7:47             ` efi/gop: skip cur_mode in choose_mode_auto Ard Biesheuvel
2020-03-26 23:56         ` [PATCH v2 00/14] efi/gop: Refactoring + mode-setting feature Arvind Sankar
2020-03-28 15:43           ` Ard Biesheuvel
2020-03-25 16:50   ` Hans de Goede
2020-03-25 22:13     ` Arvind Sankar
2020-03-20  2:00 ` [PATCH v2 01/14] efi/gop: Remove redundant current_fb_base Arvind Sankar
2020-03-20  2:00 ` [PATCH v2 02/14] efi/gop: Move check for framebuffer before con_out Arvind Sankar
2020-03-20  2:00 ` [PATCH v2 03/14] efi/gop: Get mode information outside the loop Arvind Sankar
2020-03-20  2:00 ` [PATCH v2 04/14] efi/gop: Factor out locating the gop into a function Arvind Sankar
2020-03-20  2:00 ` [PATCH v2 05/14] efi/gop: Slightly re-arrange logic of find_gop Arvind Sankar
2020-03-20  2:00 ` [PATCH v2 06/14] efi/gop: Move variable declarations into loop block Arvind Sankar
2020-03-20  2:00 ` [PATCH v2 07/14] efi/gop: Use helper macros for populating lfb_base Arvind Sankar
2020-03-20  2:00 ` [PATCH v2 08/14] efi/gop: Use helper macros for find_bits Arvind Sankar
2020-03-20  2:00 ` [PATCH v2 09/14] efi/gop: Remove unreachable code from setup_pixel_info Arvind Sankar
2020-03-20  2:00 ` [PATCH v2 10/14] efi/gop: Add prototypes for query_mode and set_mode Arvind Sankar
2020-03-20  2:00 ` [PATCH v2 11/14] efi/gop: Allow specifying mode number on command line Arvind Sankar
2020-03-20  2:00 ` [PATCH v2 12/14] efi/gop: Allow specifying mode by <xres>x<yres> Arvind Sankar
2020-03-20  2:00 ` [PATCH v2 13/14] efi/gop: Allow specifying depth as well as resolution Arvind Sankar
2020-03-20  2:00 ` [PATCH v2 14/14] efi/gop: Allow automatically choosing the best mode Arvind Sankar

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