Subject: Re: linux-next: build warning after merge of the tpmdd tree

From: Colin Ian King <[email-masked]>
Date: Thu, 7 Sep 2017 09:43:37 +0100

Thanks for reporting that Stephen, I've sent a fix to address this issue.

Colin

On 07/09/17 03:31, Stephen Rothwell wrote:
> Hi Jarkko,
> 
> After merging the tpmdd tree, today's linux-next build (x86_64
> allmodconfig) produced this warning:
> 
> drivers/char/tpm/tpm_tis_core.c: In function 'probe_itpm':
> drivers/char/tpm/tpm_tis_core.c:469:31: warning: passing argument 2 of 'tpm_tis_send_data' discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
>   rc = tpm_tis_send_data(chip, cmd_getticks, len);
>                                ^
> drivers/char/tpm/tpm_tis_core.c:255:12: note: expected 'u8 * {aka unsigned char *}' but argument is of type 'const u8 * {aka const unsigned char *}'
>  static int tpm_tis_send_data(struct tpm_chip *chip, u8 *buf, size_t len)
>             ^
> drivers/char/tpm/tpm_tis_core.c:477:31: warning: passing argument 2 of 'tpm_tis_send_data' discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
>   rc = tpm_tis_send_data(chip, cmd_getticks, len);
>                                ^
> drivers/char/tpm/tpm_tis_core.c:255:12: note: expected 'u8 * {aka unsigned char *}' but argument is of type 'const u8 * {aka const unsigned char *}'
>  static int tpm_tis_send_data(struct tpm_chip *chip, u8 *buf, size_t len)
>             ^
> 
> Introduced by commit
> 
>   5e35bd8e06b9 ("tpm_tis: make array cmd_getticks static const to shink object code size")
>