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[drivers][block] Keep I/O inside the logical partition by manyangshen · Pull Request #11824 · RT-Thread/rt-thread · GitHub

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[drivers][block] Keep I/O inside the logical partition #11824

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[drivers][block] Keep I/O inside the logical partition #11824

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8 changes: 4 additions & 4 deletions components/drivers/block/blk_dev.c
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Original file line number Diff line number Diff line change
Expand Up @@ -38,8 +38,8 @@ static rt_ssize_t blk_dev_read(rt_device_t dev, rt_off_t sector,
{
struct rt_blk_device *blk = to_blk(dev);

if (sector <= blk->sector_start + blk->sector_count &&
sector_count <= blk->sector_count)
if (sector >= 0 && (rt_size_t)sector <= blk->sector_count &&
sector_count <= blk->sector_count - (rt_size_t)sector)
{
return rt_device_read(&blk->disk->parent,
blk->sector_start + sector, buffer, sector_count);
Expand All @@ -53,8 +53,8 @@ static rt_ssize_t blk_dev_write(rt_device_t dev, rt_off_t sector,
{
struct rt_blk_device *blk = to_blk(dev);

if (sector <= blk->sector_start + blk->sector_count &&
sector_count <= blk->sector_count)
if (sector >= 0 && (rt_size_t)sector <= blk->sector_count &&
sector_count <= blk->sector_count - (rt_size_t)sector)
{
return rt_device_write(&blk->disk->parent,
blk->sector_start + sector, buffer, sector_count);
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