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spi: Fixes for v5.2

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A small set of fixes here, one core fix for error handling when we fail
 to set up the hardware before initiating a transfer and another one
 reverting a change in the core which broke Raspberry Pi in common use
 cases as part of some optimization work.  There's also a couple of
 driver specific fixes.
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Merge tag 'spi-fix-v5.2-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi

Pull spi fixes from Mark Brown:
 "A small set of fixes here.

  One core fix for error handling when we fail to set up the hardware
  before initiating a transfer and another one reverting a change in the
  core which broke Raspberry Pi in common use cases as part of some
  optimization work.

  There's also a couple of driver specific fixes"

* tag 'spi-fix-v5.2-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
  spi: abort spi_sync if failed to prepare_transfer_hardware
  spi: spi-fsl-spi: call spi_finalize_current_message() at the end
  spi: bitbang: Fix NULL pointer dereference in spi_unregister_master
  spi: Fix Raspberry Pi breakage
This commit is contained in:
Linus Torvalds 2019-06-10 07:19:56 -10:00
commit e59bf4282c
3 changed files with 10 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/spi/spi-bitbang.c
View File

@ -406,7 +406,7 @@ int spi_bitbang_start(struct spi_bitbang *bitbang)
if (ret)
spi_master_put(master);
return 0;
return ret;
}
EXPORT_SYMBOL_GPL(spi_bitbang_start);

2
drivers/spi/spi-fsl-spi.c
View File

@ -428,7 +428,6 @@ static int fsl_spi_do_one_msg(struct spi_master *master,
}
m->status = status;
spi_finalize_current_message(master);
if (status || !cs_change) {
ndelay(nsecs);
@ -436,6 +435,7 @@ static int fsl_spi_do_one_msg(struct spi_master *master,
}
fsl_spi_setup_transfer(spi, NULL);
spi_finalize_current_message(master);
return 0;
}

11
drivers/spi/spi.c
View File

@ -1181,10 +1181,10 @@ out:
if (msg->status && ctlr->handle_err)
ctlr->handle_err(ctlr, msg);
spi_finalize_current_message(ctlr);
spi_res_release(ctlr, msg);
spi_finalize_current_message(ctlr);
return ret;
}
@ -1307,10 +1307,15 @@ static void __spi_pump_messages(struct spi_controller *ctlr, bool in_kthread)
ret = ctlr->prepare_transfer_hardware(ctlr);
if (ret) {
dev_err(&ctlr->dev,
"failed to prepare transfer hardware\n");
"failed to prepare transfer hardware: %d\n",
ret);
if (ctlr->auto_runtime_pm)
pm_runtime_put(ctlr->dev.parent);
ctlr->cur_msg->status = ret;
spi_finalize_current_message(ctlr);
mutex_unlock(&ctlr->io_mutex);
return;
}