[PATCH] cfi_flash: show progress while during erase

[Franck Jullien]

2014-05-27 7:42 GMT+02:00 Sascha Hauer <s.hauer at pengutronix.de>:
> On Mon, May 26, 2014 at 08:20:52PM +0200, Franck Jullien wrote:
>> Sascha,
>>
>> Any reason why you removed the progress bar here in this commit:
>> 2749fbac48374b5f5ced ?
>
> The reason was that with the conversion of the cfi driver to mtd the
> loop over the erase blocks was no longer in the cfi driver but in the
> mtd layer. So if you see a progress bar for each erased block. You are
> probably irritated because of this patch which came in later:
>
> | commit 0d7ac7c3817e006cc4e258522a989642f1be1538
> | Author: Sascha Hauer <s.hauer at pengutronix.de>
> | Date:   Sat May 25 00:16:31 2013 +0200
> |
> |     mtd: call mtd_erase with complete area if possible
> |
> |     If a device does not have bad blocks loop over the eraseblocks
> |     in the driver instead of the core. This allows the mtd_dataflash
> |     driver to erase blocks instead of pages to gain more speed during
> |     erasing. Also the mtd_dataflash driver modifies the erase_info
> |     struct which causes the outer loop in the core to never end.
> |
> |     Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
> |
> | diff --git a/drivers/mtd/core.c b/drivers/mtd/core.c
> | index 61744b6..f358098 100644
> | --- a/drivers/mtd/core.c
> | +++ b/drivers/mtd/core.c
> | @@ -107,6 +107,12 @@ static int mtd_op_erase(struct cdev *cdev, size_t count, loff_t offset)
> |       memset(&erase, 0, sizeof(erase));
> |       erase.mtd = mtd;
> |       erase.addr = offset;
> | +
> | +     if (!mtd->block_isbad) {
> | +             erase.len = count;
> | +             return mtd_erase(mtd, &erase);
> | +     }
> | +
> |       erase.len = mtd->erasesize;
> |
> |       while (count > 0) {
>
> This moves the eraseblock iteration back into the drivers when the
> device does not have bad blocks, which is the case for cfi flashes.
>

Ok. So brings back the progress bar in the cfi_flash driver is good.

For NAND devices we could add a progress bar in the mtd core file.
However, I don't have a nand on my board so I can't test it.

Now, what would you think if we had a command line option to make
erase quiet (-q) ?
By default we would have a progress bar displayed.

Franck.

> Sascha
>
>
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