Re: [PATCH v3] mtd: rawnand: Mark expected switch fall-throughs

Miquel Raynal
2019-04-01T15:23:17Z

Hi Gustavo,

"Gustavo A. R. Silva" <gustavo@embeddedor.com> wrote on Fri, 8 Feb 2019
11:49:30 -0600:

> In preparation to enabling -Wimplicit-fallthrough, mark switch
> cases where we are expecting to fall through.
>
> This patch fixes the following warning:
>
> drivers/mtd/nand/raw/diskonchip.c: In function ‘doc_probe’:
> ./include/linux/printk.h:303:2: warning: this statement may fall through [-Wimplicit-fallthrough=]
> printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> drivers/mtd/nand/raw/diskonchip.c:1479:4: note: in expansion of macro ‘pr_err’
> pr_err("DiskOnChip Millennium Plus 32MB is not supported, ignoring.\n");
> ^~~~~~
> drivers/mtd/nand/raw/diskonchip.c:1480:3: note: here
> default:
> ^~~~~~~
> drivers/mtd/nand/raw/nandsim.c: In function ‘ns_init_module’:
> drivers/mtd/nand/raw/nandsim.c:2254:22: warning: this statement may fall through [-Wimplicit-fallthrough=]
> chip->bbt_options |= NAND_BBT_NO_OOB;
> drivers/mtd/nand/raw/nandsim.c:2255:2: note: here
> case 1:
> ^~~~
> drivers/mtd/nand/raw/nuc900_nand.c: In function ‘nuc900_nand_command_lp’:
> ./arch/x86/include/asm/io.h:91:22: warning: this statement may fall through [-Wimplicit-fallthrough=]
> #define __raw_writel __writel
> drivers/mtd/nand/raw/nuc900_nand.c:52:2: note: in expansion of macro ‘__raw_writel’
> __raw_writel((val), (dev)->reg + REG_SMCMD)
> ^~~~~~~~~~~~
> drivers/mtd/nand/raw/nuc900_nand.c:196:3: note: in expansion of macro ‘write_cmd_reg’
> write_cmd_reg(nand, NAND_CMD_READSTART);
> ^~~~~~~~~~~~~
> drivers/mtd/nand/raw/nuc900_nand.c:197:2: note: here
> default:
> ^~~~~~~
> drivers/mtd/nand/raw/omap_elm.c: In function ‘elm_context_restore’:
> drivers/mtd/nand/raw/omap_elm.c:512:4: warning: this statement may fall through [-Wimplicit-fallthrough=]
> elm_write_reg(info, ELM_SYNDROME_FRAGMENT_4 + offset,
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> regs->elm_syndrome_fragment_4[i]);
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> drivers/mtd/nand/raw/omap_elm.c:514:3: note: here
> case BCH8_ECC:
> ^~~~
> drivers/mtd/nand/raw/omap_elm.c:517:4: warning: this statement may fall through [-Wimplicit-fallthrough=]
> elm_write_reg(info, ELM_SYNDROME_FRAGMENT_2 + offset,
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> regs->elm_syndrome_fragment_2[i]);
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> drivers/mtd/nand/raw/omap_elm.c:519:3: note: here
> case BCH4_ECC:
> ^~~~
> drivers/mtd/nand/raw/omap_elm.c: In function ‘elm_context_save’:
> drivers/mtd/nand/raw/omap_elm.c:466:37: warning: this statement may fall through [-Wimplicit-fallthrough=]
> regs->elm_syndrome_fragment_4[i] = elm_read_reg(info,
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~
> ELM_SYNDROME_FRAGMENT_4 + offset);
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> drivers/mtd/nand/raw/omap_elm.c:468:3: note: here
> case BCH8_ECC:
> ^~~~
> drivers/mtd/nand/raw/omap_elm.c:471:37: warning: this statement may fall through [-Wimplicit-fallthrough=]
> regs->elm_syndrome_fragment_2[i] = elm_read_reg(info,
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~
> ELM_SYNDROME_FRAGMENT_2 + offset);
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> drivers/mtd/nand/raw/omap_elm.c:473:3: note: here
> case BCH4_ECC:
> ^~~~
>
> Warning level 3 was used: -Wimplicit-fallthrough=3
>
> This patch is part of the ongoing efforts to enabling
> -Wimplicit-fallthrough.
>
> Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
> ---

Applied to git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git
on nand/next.

Thanks,
Miquèl