From: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Date: Tue, 4 Jan 2022 17:54:18 +0900
Subject: ata: fix read_id() ata port operation interface
Git-commit: 0561e514c944da874ccdfbe2922f71b4c333c7e1
Patch-mainline: v5.17-rc1
References: jsc#PED-1118
Drivers that need to tweak a device IDENTIFY data implement the
read_id() port operation. The IDENTIFY data buffer is passed as an
argument to the read_id() operation for drivers to use. However, when
this operation is called, the IDENTIFY data is not yet converted to CPU
endian and contains le16 words.
Change the interface of the read_id operation to pass a __le16 * pointer
to the IDENTIFY data buffer to clarify the buffer endianness. Fix the
pata_netcell, pata_it821x, ahci_xgene, ahci_ceva and ahci_brcm drivers
implementation of this operation and modify the code to corretly deal
with identify data words manipulation to avoid sparse warnings such as:
drivers/ata/ahci_xgene.c:262:33: warning: invalid assignment: &=
drivers/ata/ahci_xgene.c:262:33: left side has type unsigned short
drivers/ata/ahci_xgene.c:262:33: right side has type restricted __le16
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Acked-by: Lee Duncan <lduncan@suse.com>
---
drivers/ata/ahci_brcm.c | 2 +-
drivers/ata/ahci_xgene.c | 2 +-
drivers/ata/libata-core.c | 6 +++---
drivers/ata/pata_it821x.c | 23 +++++++++++------------
drivers/ata/pata_netcell.c | 5 +++--
include/linux/libata.h | 5 +++--
6 files changed, 22 insertions(+), 21 deletions(-)
--- a/drivers/ata/ahci_brcm.c
+++ b/drivers/ata/ahci_brcm.c
@@ -246,7 +246,7 @@ static void brcm_sata_init(struct brcm_a
}
static unsigned int brcm_ahci_read_id(struct ata_device *dev,
- struct ata_taskfile *tf, u16 *id)
+ struct ata_taskfile *tf, __le16 *id)
{
struct ata_port *ap = dev->link->ap;
struct ata_host *host = ap->host;
--- a/drivers/ata/ahci_xgene.c
+++ b/drivers/ata/ahci_xgene.c
@@ -237,7 +237,7 @@ static bool xgene_ahci_is_memram_inited(
* does not support DEVSLP.
*/
static unsigned int xgene_ahci_read_id(struct ata_device *dev,
- struct ata_taskfile *tf, u16 *id)
+ struct ata_taskfile *tf, __le16 *id)
{
u32 err_mask;
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -1722,7 +1722,7 @@ static u32 ata_pio_mask_no_iordy(const s
* this function is wrapped or replaced by the driver
*/
unsigned int ata_do_dev_read_id(struct ata_device *dev,
- struct ata_taskfile *tf, u16 *id)
+ struct ata_taskfile *tf, __le16 *id)
{
return ata_exec_internal(dev, tf, NULL, DMA_FROM_DEVICE,
id, sizeof(id[0]) * ATA_ID_WORDS, 0);
@@ -1795,9 +1795,9 @@ retry:
tf.flags |= ATA_TFLAG_POLLING;
if (ap->ops->read_id)
- err_mask = ap->ops->read_id(dev, &tf, id);
+ err_mask = ap->ops->read_id(dev, &tf, (__le16 *)id);
else
- err_mask = ata_do_dev_read_id(dev, &tf, id);
+ err_mask = ata_do_dev_read_id(dev, &tf, (__le16 *)id);
if (err_mask) {
if (err_mask & AC_ERR_NODEV_HINT) {
--- a/drivers/ata/pata_it821x.c
+++ b/drivers/ata/pata_it821x.c
@@ -534,7 +534,7 @@ static void it821x_dev_config(struct ata
*/
static unsigned int it821x_read_id(struct ata_device *adev,
- struct ata_taskfile *tf, u16 *id)
+ struct ata_taskfile *tf, __le16 *id)
{
unsigned int err_mask;
unsigned char model_num[ATA_ID_PROD_LEN + 1];
@@ -542,21 +542,20 @@ static unsigned int it821x_read_id(struc
err_mask = ata_do_dev_read_id(adev, tf, id);
if (err_mask)
return err_mask;
- ata_id_c_string(id, model_num, ATA_ID_PROD, sizeof(model_num));
+ ata_id_c_string((u16 *)id, model_num, ATA_ID_PROD, sizeof(model_num));
- id[83] &= ~(1 << 12); /* Cache flush is firmware handled */
- id[83] &= ~(1 << 13); /* Ditto for LBA48 flushes */
- id[84] &= ~(1 << 6); /* No FUA */
- id[85] &= ~(1 << 10); /* No HPA */
- id[76] = 0; /* No NCQ/AN etc */
+ id[83] &= cpu_to_le16(~(1 << 12)); /* Cache flush is firmware handled */
+ id[84] &= cpu_to_le16(~(1 << 6)); /* No FUA */
+ id[85] &= cpu_to_le16(~(1 << 10)); /* No HPA */
+ id[76] = 0; /* No NCQ/AN etc */
if (strstr(model_num, "Integrated Technology Express")) {
/* Set feature bits the firmware neglects */
- id[49] |= 0x0300; /* LBA, DMA */
- id[83] &= 0x7FFF;
- id[83] |= 0x4400; /* Word 83 is valid and LBA48 */
- id[86] |= 0x0400; /* LBA48 on */
- id[ATA_ID_MAJOR_VER] |= 0x1F;
+ id[49] |= cpu_to_le16(0x0300); /* LBA, DMA */
+ id[83] &= cpu_to_le16(0x7FFF);
+ id[83] |= cpu_to_le16(0x4400); /* Word 83 is valid and LBA48 */
+ id[86] |= cpu_to_le16(0x0400); /* LBA48 on */
+ id[ATA_ID_MAJOR_VER] |= cpu_to_le16(0x1F);
/* Clear the serial number because it's different each boot
which breaks validation on resume */
memset(&id[ATA_ID_SERNO], 0x20, ATA_ID_SERNO_LEN);
--- a/drivers/ata/pata_netcell.c
+++ b/drivers/ata/pata_netcell.c
@@ -21,12 +21,13 @@
/* No PIO or DMA methods needed for this device */
static unsigned int netcell_read_id(struct ata_device *adev,
- struct ata_taskfile *tf, u16 *id)
+ struct ata_taskfile *tf, __le16 *id)
{
unsigned int err_mask = ata_do_dev_read_id(adev, tf, id);
+
/* Firmware forgets to mark words 85-87 valid */
if (err_mask == 0)
- id[ATA_ID_CSF_DEFAULT] |= 0x4000;
+ id[ATA_ID_CSF_DEFAULT] |= cpu_to_le16(0x4000);
return err_mask;
}
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -897,7 +897,8 @@ struct ata_port_operations {
void (*set_piomode)(struct ata_port *ap, struct ata_device *dev);
void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev);
int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev);
- unsigned int (*read_id)(struct ata_device *dev, struct ata_taskfile *tf, u16 *id);
+ unsigned int (*read_id)(struct ata_device *dev, struct ata_taskfile *tf,
+ __le16 *id);
void (*dev_config)(struct ata_device *dev);
@@ -1132,7 +1133,7 @@ extern void ata_id_string(const u16 *id,
extern void ata_id_c_string(const u16 *id, unsigned char *s,
unsigned int ofs, unsigned int len);
extern unsigned int ata_do_dev_read_id(struct ata_device *dev,
- struct ata_taskfile *tf, u16 *id);
+ struct ata_taskfile *tf, __le16 *id);
extern void ata_qc_complete(struct ata_queued_cmd *qc);
extern u64 ata_qc_get_active(struct ata_port *ap);
extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd);