| Message ID | ce58178c-7f26-a9a1-443a-71577162c814@loongson.cn |
|---|---|
| State | New |
| Headers | show |
| Series | Problem and solution about SCSI configs | expand |
On Mon, 2024-04-29 at 17:29 +0800, Tiezhu Yang wrote: [...] > Could you please let me know are you OK with the following change? > > -- >8 -- > diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig > index 634f2f501c6c..3e59e3e59e79 100644 > --- a/drivers/scsi/Kconfig > +++ b/drivers/scsi/Kconfig > @@ -25,6 +25,7 @@ config SCSI > select SG_POOL > select SCSI_COMMON > select BLK_DEV_BSG_COMMON if BLK_DEV_BSG > + select BLK_DEV_SD if SCSI=y > help > If you want to use a SCSI hard disk, SCSI tape drive, SCSI > CD-ROM or > any other SCSI device under Linux, say Y and make sure > that > you know > > If yes, I will post a formal patch later. No: this is a distro config problem not a kernel one. If the distro doesn't boot with an initrd then every module used by the boot (including all the SCSI drivers) must be built in and the distro kernel builder must ensure that. James
diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig index 634f2f501c6c..3e59e3e59e79 100644 --- a/drivers/scsi/Kconfig +++ b/drivers/scsi/Kconfig @@ -25,6 +25,7 @@ config SCSI select SG_POOL select SCSI_COMMON select BLK_DEV_BSG_COMMON if BLK_DEV_BSG + select BLK_DEV_SD if SCSI=y help If you want to use a SCSI hard disk, SCSI tape drive, SCSI CD-ROM or
Hi all, In the current code, if the rootfs is located on a SCSI device and root= /dev/sda3 is specified as boot option in grub.cfg, kernel boots failed with CONFIG_SCSI=y and CONFIG_BLK_DEV_SD=m when there is no initrd, here are the boot messages via the serial console: /dev/root: Can't open blockdev VFS: Cannot open root device "/dev/sda3" or unknown-block(0,0): error -6 Please append a correct "root=" boot option; here are the available partitions: ... Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) Set CONFIG_BLK_DEV_SD=y can solve the above issue, but in order to avoid the potential failure, it is better to restrict the configs. Here are some backgrounds according to Documentation/scsi/scsi.rst and drivers/scsi/Kconfig: The SCSI support in the Linux kernel can be modularized in a number of different ways depending upon the needs of the end user. The scsi-core (also known as the "mid level") contains the core of SCSI support. Without it you can do nothing with any of the other SCSI drivers. The SCSI core support can be a module, or it can be built into the kernel. If the core is a module, it must be the first SCSI module loaded, and if you unload the modules, it will have to be the last one unloaded. The individual upper and lower level drivers can be loaded in any order once the SCSI core is present in the kernel (either compiled in or loaded as a module). The disk driver, CD-ROM driver, tape driver and SCSI generics driver represent the upper level drivers to support the various assorted devices which can be controlled. You can for example load the tape driver to use the tape drive, and then unload it once you have no further need for the driver (and release the associated memory). However, do not compile the SCSI disk driver as a module if your root file system is located on a SCSI device. In this case, do not compile the driver for your SCSI host adapter as a module either. That is to say, if you want to use an ATA hard disk as root device, config ATA will be set as y and select CONFIG_SCSI, then CONFIG_BLK_DEV_SD should be set as y and it can not be modified as m through the defconfig or make menuconfig if CONFIG_SCSI is y, the simple way is to let CONFIG_SCSI select CONFIG_BLK_DEV_SD if CONFIG_SCSI is y. Could you please let me know are you OK with the following change? -- >8 -- any other SCSI device under Linux, say Y and make sure that you know If yes, I will post a formal patch later. Thanks, Tiezhu