lkml.org 
[lkml]   [2020]   [Apr]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [RFC PATCH] mtd: lpddr: Fix bad logic in print_drs_error
Hi Joe,

Joe Perches <joe@perches.com> wrote on Mon, 30 Mar 2020 12:56:59 -0700:

> Update logic for broken test.
> Use a more common logging style.
>
> Miscellanea:
>
> o Coalesce formats
>
> Signed-off-by: Joe Perches <joe@perches.com>
> ---
>
> Found by inspection of include files using printk.
>
> It appears the logic in this function is broken for the
> consecutive tests of
>
> if (prog_status & 0x3)
> ...
> else if (prog_status & 0x2)
> ...
> else (prog_status & 0x1)
> ...
>
> Likely the first test should be
>
> if ((prog_status & 0x3) == 0x3)

I had a hard time understanding the patch just with the commit log, I
think the above text is as important.

In fact, would you mind doing the printk->pr_notice in a first patch,
and fix the wrong condition in a separate change?

>
> And this function is only used in drivers/mtd/lpddr/lpddr_cmds.c
> perhaps it should be moved there.

Agreed, do not hesitate to move the function as suggested in a third
patch.

>
> include/linux/mtd/pfow.h | 31 ++++++++++++++-----------------
> 1 file changed, 14 insertions(+), 17 deletions(-)
>
> diff --git a/include/linux/mtd/pfow.h b/include/linux/mtd/pfow.h
> index 122f343..1c08e75 100644
> --- a/include/linux/mtd/pfow.h
> +++ b/include/linux/mtd/pfow.h
> @@ -127,31 +127,28 @@ static inline void print_drs_error(unsigned dsr)
> int prog_status = (dsr & DSR_RPS) >> 8;
>
> if (!(dsr & DSR_AVAILABLE))
> - printk(KERN_NOTICE"DSR.15: (0) Device not Available\n");
> - if (prog_status & 0x03)
> - printk(KERN_NOTICE"DSR.9,8: (11) Attempt to program invalid "
> - "half with 41h command\n");
> + pr_notice("DSR.15: (0) Device not Available\n");
> +
> + if ((prog_status & 0x03) == 0x03)
> + pr_notice("DSR.9,8: (11) Attempt to program invalid half with 41h command\n");
> else if (prog_status & 0x02)
> - printk(KERN_NOTICE"DSR.9,8: (10) Object Mode Program attempt "
> - "in region with Control Mode data\n");
> + pr_notice("DSR.9,8: (10) Object Mode Program attempt in region with Control Mode data\n");
> else if (prog_status & 0x01)
> - printk(KERN_NOTICE"DSR.9,8: (01) Program attempt in region "
> - "with Object Mode data\n");
> + pr_notice("DSR.9,8: (01) Program attempt in region with Object Mode data\n");
> +
> if (!(dsr & DSR_READY_STATUS))
> - printk(KERN_NOTICE"DSR.7: (0) Device is Busy\n");
> + pr_notice("DSR.7: (0) Device is Busy\n");
> if (dsr & DSR_ESS)
> - printk(KERN_NOTICE"DSR.6: (1) Erase Suspended\n");
> + pr_notice("DSR.6: (1) Erase Suspended\n");
> if (dsr & DSR_ERASE_STATUS)
> - printk(KERN_NOTICE"DSR.5: (1) Erase/Blank check error\n");
> + pr_notice("DSR.5: (1) Erase/Blank check error\n");
> if (dsr & DSR_PROGRAM_STATUS)
> - printk(KERN_NOTICE"DSR.4: (1) Program Error\n");
> + pr_notice("DSR.4: (1) Program Error\n");
> if (dsr & DSR_VPPS)
> - printk(KERN_NOTICE"DSR.3: (1) Vpp low detect, operation "
> - "aborted\n");
> + pr_notice("DSR.3: (1) Vpp low detect, operation aborted\n");
> if (dsr & DSR_PSS)
> - printk(KERN_NOTICE"DSR.2: (1) Program suspended\n");
> + pr_notice("DSR.2: (1) Program suspended\n");
> if (dsr & DSR_DPS)
> - printk(KERN_NOTICE"DSR.1: (1) Aborted Erase/Program attempt "
> - "on locked block\n");
> + pr_notice("DSR.1: (1) Aborted Erase/Program attempt on locked block\n");
> }
> #endif /* __LINUX_MTD_PFOW_H */
>
>

Thanks,
Miquèl

\
 
 \ /
  Last update: 2020-04-27 15:29    [W:0.050 / U:1.152 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site