-----Original Message-----
From: Pavel Machek <pavel@...>
Sent: 23 November 2020 19:44
To: Prabhakar Mahadev Lad <prabhakar.mahadev-lad.rj@...>
Cc: cip-dev@...; Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@...>; Pavel Machek
<pavel@...>; Biju Das <biju.das.jz@...>
Subject: Re: [PATCH 4.19.y-cip 5/7] spi: spi-mem: Split spi_mem_exec_op() code

Hi!

From: Boris Brezillon <boris.brezillon@...>

commit f86c24f4795303e4024bc113196de32782f6ccb5 upstream.

The logic surrounding the ->exec_op() call applies to direct mapping
accessors. Move this code to separate functions to avoid duplicating
code.

+++ b/drivers/spi/spi-mem.c
@@ -213,6 +213,44 @@ bool spi_mem_supports_op(struct spi_mem *mem, const struct spi_mem_op *op)
}
EXPORT_SYMBOL_GPL(spi_mem_supports_op);

+static int spi_mem_access_start(struct spi_mem *mem)
+{
+ struct spi_controller *ctlr = mem->spi->controller;

...

+ if (ctlr->auto_runtime_pm) {
+ int ret;
+
+ ret = pm_runtime_get_sync(ctlr->dev.parent);
+ if (ret < 0) {
+ dev_err(&ctlr->dev, "Failed to power device: %d\n",
+ ret);
+ return ret;
+ }

This misses pm_runtime_put() in the error case.

+ mutex_lock(&ctlr->bus_lock_mutex);
+ mutex_lock(&ctlr->io_mutex);

Plus hiding locking into function like this ... is quite
"interesting".

Best regards,
Pavel

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