[PATCH] tty: hvc: Fix the RISC-V SBI driver for a refactoring

[PATCH] tty: hvc: Fix the RISC-V SBI driver for a refactoring

[Palmer Dabbelt]

From: Palmer Dabbelt <palmer@rivosinc.com>

I missed the int->size_t refactoring in f32fcbedbe92 ("tty: hvc: convert
to u8 and size_t"), which causes the newly used ops in 88ead68e764c
("tty: Add SBI debug console support to HVC SBI driver") to fail to
build due to a

linux/drivers/tty/hvc/hvc_riscv_sbi.c:59:15: error: incompatible function pointer types initializing 'ssize_t (*)(uint32_t, const u8 *, size_t)' (aka 'long (*)(unsigned int, const unsigned char *, unsigned long)') with an expression of type 'int (uint32_t, const char *, int)' (aka 'int (unsigned int, const char *, int)') [-Wincompatible-function-pointer-types]
        .put_chars = hvc_sbi_dbcn_tty_put,

Fixes: f32fcbedbe92 ("tty: hvc: convert to u8 and size_t")
Fixes: 88ead68e764c ("tty: Add SBI debug console support to HVC SBI driver")
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
---
I now remember Anup pointing this one out, but looks like I forgot about
it.
---
 drivers/tty/hvc/hvc_riscv_sbi.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/tty/hvc/hvc_riscv_sbi.c b/drivers/tty/hvc/hvc_riscv_sbi.c
index 2f3571f17ecd..c08718be8e73 100644
--- a/drivers/tty/hvc/hvc_riscv_sbi.c
+++ b/drivers/tty/hvc/hvc_riscv_sbi.c
@@ -15,7 +15,7 @@
 
 #include "hvc_console.h"
 
-static int hvc_sbi_tty_put(uint32_t vtermno, const char *buf, int count)
+static size_t hvc_sbi_tty_put(uint32_t vtermno, const char *buf, int count)
 {
 	int i;
 
@@ -25,7 +25,7 @@ static int hvc_sbi_tty_put(uint32_t vtermno, const char *buf, int count)
 	return i;
 }
 
-static int hvc_sbi_tty_get(uint32_t vtermno, char *buf, int count)
+static size_t hvc_sbi_tty_get(uint32_t vtermno, char *buf, int count)
 {
 	int i, c;
 
-- 
2.43.0

Re: [PATCH] tty: hvc: Fix the RISC-V SBI driver for a refactoring

[Palmer Dabbelt]

On Fri, 19 Jan 2024 13:56:13 PST (-0800), Palmer Dabbelt wrote:
> From: Palmer Dabbelt <palmer@rivosinc.com>
>
> I missed the int->size_t refactoring in f32fcbedbe92 ("tty: hvc: convert
> to u8 and size_t"), which causes the newly used ops in 88ead68e764c
> ("tty: Add SBI debug console support to HVC SBI driver") to fail to
> build due to a
>
> linux/drivers/tty/hvc/hvc_riscv_sbi.c:59:15: error: incompatible function pointer types initializing 'ssize_t (*)(uint32_t, const u8 *, size_t)' (aka 'long (*)(unsigned int, const unsigned char *, unsigned long)') with an expression of type 'int (uint32_t, const char *, int)' (aka 'int (unsigned int, const char *, int)') [-Wincompatible-function-pointer-types]
>         .put_chars = hvc_sbi_dbcn_tty_put,
>
> Fixes: f32fcbedbe92 ("tty: hvc: convert to u8 and size_t")
> Fixes: 88ead68e764c ("tty: Add SBI debug console support to HVC SBI driver")
> Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
> ---
> I now remember Anup pointing this one out, but looks like I forgot about
> it.
> ---
>  drivers/tty/hvc/hvc_riscv_sbi.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/tty/hvc/hvc_riscv_sbi.c b/drivers/tty/hvc/hvc_riscv_sbi.c
> index 2f3571f17ecd..c08718be8e73 100644
> --- a/drivers/tty/hvc/hvc_riscv_sbi.c
> +++ b/drivers/tty/hvc/hvc_riscv_sbi.c
> @@ -15,7 +15,7 @@
>
>  #include "hvc_console.h"
>
> -static int hvc_sbi_tty_put(uint32_t vtermno, const char *buf, int count)
> +static size_t hvc_sbi_tty_put(uint32_t vtermno, const char *buf, int count)

I got a little lost in my branches here, that should be "ssize_t".  I'll 
send a v2 when I figure out why my tester is acting oddly...

>  {
>  	int i;
>
> @@ -25,7 +25,7 @@ static int hvc_sbi_tty_put(uint32_t vtermno, const char *buf, int count)
>  	return i;
>  }
>
> -static int hvc_sbi_tty_get(uint32_t vtermno, char *buf, int count)
> +static size_t hvc_sbi_tty_get(uint32_t vtermno, char *buf, int count)
>  {
>  	int i, c;