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Thu, 23 Apr 2026 13:20:59 -0700 (PDT) From: Florian Fuchs To: linux-sh@vger.kernel.org, John Paul Adrian Glaubitz , Artur Rojek Cc: Adrian McMenamin , linux-kernel@vger.kernel.org, Florian Fuchs Subject: [PATCH v3 1/3] cdrom: gdrom: replace port I/O with MMIO accessors Date: Thu, 23 Apr 2026 21:41:30 +0200 Message-ID: <20260423194132.693271-2-fuchsfl@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260423194132.693271-1-fuchsfl@gmail.com> References: <20260423194132.693271-1-fuchsfl@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit GDROM_DATA_REG is a memory-mapped data register, but the driver uses outsw() and insw() only for this register. Replace this with MMIO accessors readsw() / writesw(). Before, it oopsed accessing the data register, as the io_port_base P2SEG gets added to the argument in outsw() / insw(), which leads to an unusable drive: BUG: unable to handle kernel paging request at 405f7080 PC: [<8c28d5b4>] gdrom_spicommand+0x6c/0xb0 Signed-off-by: Florian Fuchs Acked-by: Artur Rojek Reviewed-by: Adrian McMenamin --- v2->v3: no functional change. Added Acked-by from Artur Rojek. Added Reviewed-by tag from Adrian McMenamin. v1->v2: Don't use helper functions with io.*_rep(), but writesw() and readsw() local in the respective functions v2: https://lore.kernel.org/linux-sh/20260419162823.2829286-2-fuchsfl@gmail.com/ v1: https://lore.kernel.org/linux-sh/20260405082330.4104672-2-fuchsfl@gmail.com/ drivers/cdrom/gdrom.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/cdrom/gdrom.c b/drivers/cdrom/gdrom.c index 4ba4dd06cbf4..094d55b2d004 100644 --- a/drivers/cdrom/gdrom.c +++ b/drivers/cdrom/gdrom.c @@ -198,7 +198,7 @@ static void gdrom_spicommand(void *spi_string, int buflen) gdrom_getsense(NULL); return; } - outsw(GDROM_DATA_REG, cmd, 6); + writesw((void __iomem *)GDROM_DATA_REG, cmd, 6); } @@ -282,7 +282,7 @@ static int gdrom_readtoc_cmd(struct gdromtoc *toc, int session) err = -EINVAL; goto cleanup_readtoc; } - insw(GDROM_DATA_REG, toc, tocsize/2); + readsw((void __iomem *)GDROM_DATA_REG, toc, tocsize / 2); if (gd.status & 0x01) err = -EINVAL; @@ -433,7 +433,7 @@ static int gdrom_getsense(short *bufstring) GDROM_DEFAULT_TIMEOUT); if (gd.pending) goto cleanup_sense; - insw(GDROM_DATA_REG, &sense, sense_command->buflen/2); + readsw((void __iomem *)GDROM_DATA_REG, &sense, sense_command->buflen / 2); if (sense[1] & 40) { pr_info("Drive not ready - command aborted\n"); goto cleanup_sense; @@ -612,7 +612,7 @@ static blk_status_t gdrom_readdisk_dma(struct request *req) cpu_relax(); gd.pending = 1; gd.transfer = 1; - outsw(GDROM_DATA_REG, &read_command->cmd, 6); + writesw((void __iomem *)GDROM_DATA_REG, read_command->cmd, 6); timeout = jiffies + HZ / 2; /* Wait for any pending DMA to finish */ while (__raw_readb(GDROM_DMA_STATUS_REG) && -- 2.43.0