evie/android_kernel_oneplus_msm8998
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scsi: ufs: allow updating bBootLunEn via ioctl

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"bBootLunEn" attribute value decides the active Boot LUN but there could
be a case where userspace may want to change it during image update.
This change allows writing to this parameter.

Change-Id: I6e8d630606d8caf6197ef662003ec1ee646afe81
Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org>
This commit is contained in:
Subhash Jadavani 2015-10-05 16:22:38 -07:00 • committed by David Keitel
parent a2f12c7987
commit be361c995c
3 changed files with 38 additions and 3 deletions
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35
drivers/scsi/ufs/ufshcd.c
View file

@ -6777,6 +6777,37 @@ static int ufshcd_query_ioctl(struct ufs_hba *hba, u8 lun, void __user *buffer)
err = ufshcd_query_attr(hba, ioctl_data->opcode, ioctl_data->idn,
index, 0, &att);
break;
case UPIU_QUERY_OPCODE_WRITE_ATTR:
err = copy_from_user(&att,
buffer + sizeof(struct ufs_ioctl_query_data),
sizeof(u32));
if (err) {
dev_err(hba->dev,
"%s: Failed copying buffer from user, err %d\n",
__func__, err);
goto out_release_mem;
}
switch (ioctl_data->idn) {
case QUERY_ATTR_IDN_BOOT_LU_EN:
index = 0;
if (att > QUERY_ATTR_IDN_BOOT_LU_EN_MAX) {
dev_err(hba->dev,
"%s: Illegal ufs query ioctl data, opcode 0x%x, idn 0x%x, att 0x%x\n",
__func__, ioctl_data->opcode,
(unsigned int)ioctl_data->idn, att);
err = -EINVAL;
goto out_release_mem;
}
break;
default:
goto out_einval;
}
err = ufshcd_query_attr(hba, ioctl_data->opcode,
ioctl_data->idn, index, 0, &att);
break;
case UPIU_QUERY_OPCODE_READ_FLAG:
switch (ioctl_data->idn) {
case QUERY_FLAG_IDN_FDEVICEINIT:
@ -6822,8 +6853,10 @@ static int ufshcd_query_ioctl(struct ufs_hba *hba, u8 lun, void __user *buffer)
ioctl_data->buf_size = 1;
data_ptr = &flag;
break;
case UPIU_QUERY_OPCODE_WRITE_ATTR:
goto out_release_mem;
default:
BUG_ON(true);
goto out_einval;
}
/* copy to user */

4
include/uapi/scsi/ufs/ioctl.h
View file

@ -48,8 +48,8 @@ struct ufs_ioctl_query_data {
* placeholder for the start of the data buffer where kernel will copy
* the query data (attribute/flag/descriptor) read from the UFS device
* Note:
* For Read Attribute you will have to allocate 4 bytes
* For Read Flag you will have to allocate 1 byte
* For Read/Write Attribute you will have to allocate 4 bytes
* For Read/Write Flag you will have to allocate 1 byte
*/
__u8 buffer[0];
};

2
include/uapi/scsi/ufs/ufs.h
View file

@ -38,6 +38,8 @@ enum attr_idn {
QUERY_ATTR_IDN_CORR_PRG_BLK_NUM = 0x11,
};
#define QUERY_ATTR_IDN_BOOT_LU_EN_MAX 0x02
/* Descriptor idn for Query requests */
enum desc_idn {
QUERY_DESC_IDN_DEVICE = 0x0,