linux-kernel - [PATCH v2] tty: hvc: Fix the RISC-V SBI driver for a refactoring

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Message-ID: <20240119224404.26695-2-palmer@rivosinc.com>
Date: Fri, 19 Jan 2024 14:44:05 -0800
From: Palmer Dabbelt <palmer@...osinc.com>
To:         linux-riscv@...ts.infradead.org
Cc: Greg KH <gregkh@...uxfoundation.org>, jirislaby@...nel.org,
  Paul Walmsley <paul.walmsley@...ive.com>, Palmer Dabbelt <palmer@...belt.com>, aou@...s.berkeley.edu,
  ajones@...tanamicro.com, apatel@...tanamicro.com, Atish Patra <atishp@...osinc.com>,
  linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org, linux-serial@...r.kernel.org,
  linux-riscv@...ts.infradead.org, Palmer Dabbelt <palmer@...osinc.com>
Subject: [PATCH v2] tty: hvc: Fix the RISC-V SBI driver for a refactoring

From: Palmer Dabbelt <palmer@...osinc.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")
Link: https://lore.kernel.org/r/20240119215612.20529-2-palmer@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@...osinc.com>
---
Changes since v1 <20240119215612.20529-2-palmer@...osinc.com>:
* Fix the return and arguments correctly.
* Also fix the hvc_sbi_dbcn_tty_{get,put}().
---
 drivers/tty/hvc/hvc_riscv_sbi.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/tty/hvc/hvc_riscv_sbi.c b/drivers/tty/hvc/hvc_riscv_sbi.c
index 2f3571f17ecd..f8cd3310ef35 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 ssize_t hvc_sbi_tty_put(uint32_t vtermno, const u8 *buf, size_t 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 ssize_t hvc_sbi_tty_get(uint32_t vtermno, u8 *buf, size_t count)
 {
 	int i, c;
 
@@ -44,12 +44,12 @@ static const struct hv_ops hvc_sbi_v01_ops = {
 	.put_chars = hvc_sbi_tty_put,
 };
 
-static int hvc_sbi_dbcn_tty_put(uint32_t vtermno, const char *buf, int count)
+static ssize_t hvc_sbi_dbcn_tty_put(uint32_t vtermno, const u8 *buf, size_t count)
 {
 	return sbi_debug_console_write(buf, count);
 }
 
-static int hvc_sbi_dbcn_tty_get(uint32_t vtermno, char *buf, int count)
+static ssize_t hvc_sbi_dbcn_tty_get(uint32_t vtermno, u8 *buf, size_t count)
 {
 	return sbi_debug_console_read(buf, count);
 }
-- 
2.43.0